Thermo Scientific KingFisher Pure RNA Blood Kit User manual

Instruction Manual
Thermo Scientific
KingFisher Pure RNA
Blood Kit
Revision 1.0
N14035 March 2013

Copyright
© 2013 Thermo Fisher Scientific Inc. All rights reserved. PAXgene is a trademark
of PreAnalytiX GmbH (a QIAGEN / BD Company). Tempus is a trademark of
Life Technologies and its subsidiaries. Tween is a trademark of ICI Americas
Inc. Virkon is a trademark of E.I. du Pont de Nemours and Company or its
affiliates. All (other) trademarks are the property of Thermo Fisher ScientificInc.
and its subsidiaries. Reproduction of the accompanying user documentation in
whole or in part is prohibited.
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at any time to incorporate technological developments. This manual is subject
to change without prior notice as part of continuous product development.
Although this manual has been prepared with every precaution to ensure
accuracy, ThermoFisher Scientific assumes no liability for any errors or
omissions, nor for any damages resulting from the application or use of
thisinformation. This instruction manual supersedes all previous editions.
Products are for Research Use Only. Not for use in
diagnosticprocedures.
The Product will operate substantially in conformance with Thermo Fisher
Scientific’s published specifications.
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Thermo Scientific KingFisher Pure RNA Blood Kit |3Thermo Fisher Scientific
Table of Contents
Chapter 1 Kit Content..........................................5
Storage Conditions .....................................6
Additional Reagents Required .............................6
Chapter 2 Product Description ..................................9
Introduction ..........................................9
Intended Use .........................................9
Principle and Procedure ................................10
Kit Specifications .....................................10
KingFisher Magnetic Particle Processors ....................11
Chapter 3 Safety Information ..................................13
Chapter 4 Storage Conditions and Preparation of the Reagents ......15
Storage Conditions ....................................15
Preparation of the Lysis Buffer ...........................15
Preparation of the Wash Buffers and Rebinding Buffer ..........15
Preparation of the DNase I StorageSolution. . . . . . . . . . . . . . . . . . 16
Preparation of the DNase I WorkingSolution .................16
Starting Material Handling and Storage .....................16
Chapter 5 Protocols and PipettingInstructions ....................17
Handling of KingFisher Magnetic Beads.....................17
Avoiding Ribonuclease (RNase) Contamination................17
Instructions for KingFisher Flex with 96Deep Well Plates ........18
Instructions for KingFisher Duo with 12-pin Magnet Head ............20
Instructions for Total RNA Purification from PAXgene Stabilized
Blood Samples .......................................23
Instructions for Total RNA Purification from Tempus Stabilized
Blood Samples .......................................24
Quantification and Determination of thePurity of RNA ..........24
Chapter 6 General Information .................................27
Reagent Specificity and Volumes..........................27
Handling of Magnetic Beads .............................27
Binding, Wash, and Elution Steps .........................27
Decontamination and Disinfection of Sample Material ..........28
Appendix A Troubleshooting.....................................29
Appendix B Typical RNA Yields ..................................31
Appendix C Ordering Information ................................33
NOTE: For more details on storing the kit reagents, refer to “Storage Conditions” on
page 6.

Thermo Scientific KingFisher Pure RNA Blood Kit |5Thermo Fisher Scientific
1
Kit Content
Table 1-1. Thermo Scientific™ KingFisher™ Pure RNA Blood Kit
Item KingFisher Pure RNA Blood Kit
Cat. No. 98020196
Package size 96 samples
Lysis Buffer 27 ml
Proteinase K 2 x 1.0 ml
KingFisher Magnetic Beads 1 x 1.6 ml
Rebinding Buffer (conc.)* 25 ml
Wash Buffer 1 (conc.)* 100 ml
Wash Buffer 2 (conc.)* 30 ml
DNase I (lyophilized) 2 vials
DNase I Reconstitution Buffer 2 x 1.0 ml
Manganese Chloride Solution 1 ml
2 x DNase I Buffer 3 x 1.5 ml
Nuclease-free water 30 ml
* Addition of ethanol or isopropanol required.
The KingFisher Pure RNA Blood Kit (Cat. No. 98020196) is intended for the
purification of blood samples, using the Thermo Scientific™ KingFisher™
Flex with a 96 deep well head or the Thermo Scientific™ KingFisher™ Duo
with a 12-pin head and a sample volume of 200 µl.
The user will need the KingFisher Flex or KingFisher Duo magnetic particle
processor for conducting purification (Table 1-2). In addition, several
common laboratory instruments and consumables are necessary to conduct

6|Thermo Scientific KingFisher Pure RNA Blood Kit Thermo Fisher Scientific
Chapter 1 |Kit Content
an efficient purification. For more details, refer to Chapter 5: “Protocols and
PipettingInstructions”. Suitable consumables for the KingFisher Duo and
KingFisher Flex are listed in Table 1-3 and Table 1-4.
Storage Conditions
Upon arrival of the kit, store the DNase I, DNase I Reconstitution Buffer,
and 2 x DNase Buffer at -20°C. Also after dissolving of the DNase I,
continue to keep it at -20°C. The Proteinase K solution is stable at room
temperature until the seal of the vial is broken. After being opened, the vial
should be stored at -20°C. Store the Thermo Scientific™ KingFisher™
Magnetic Beads at +4°C. Other kit components can be stored at room
temperature (15−25°C). The reagents are stable for up to two years from
the manufacturing date.
Additional Reagents Required
• 96−100% ethanol (EtOH), molecular biology grade
• 100% isopropanol, molecular biology grade
• 2 M DTT (dithiothreitol) solution (store at -20°C)
• PBS (Phosphate buffered saline for Tempus™ protocol)
Table 1-2. Thermo Scientific™ KingFisher™ magnetic particle processors
Cat. No. Product
5400100 KingFisher Duo magnetic particle processor
5400630 KingFisher Flex magnetic particle processor with 96 deep well head
Table 1-3. Thermo Scientific™ KingFisher™ Flex consumables
Cat. No. Product Package size
97002534 KingFisher Flex 96 tip comb for deep well magnet 100 pcs
97002540 KingFisher Flex 96 KF plate (200 µl) 48 pcs
95040450 Microtiter deep well 96 plate 50 pcs
95040460 Microtiter deep well 96 plate, sterile 50 pcs

Thermo Scientific KingFisher Pure RNA Blood Kit |7Thermo Fisher Scientific
Kit Content |Chapter 1
Table 1-4. Thermo Scientific™ KingFisher™ Duo consumables
Cat. No. Product Package size
97003500 KingFisher Duo 12-tip comb for Microtiter deep well
96 plate
50 pcs
97003520 KingFisher Duo elution strip 40 pcs
95040450 Microtiter deep well 96 plate 50 pcs
95040460 Microtiter deep well 96 plate, sterile 50 pcs
97003530 KingFisher Duo Combi pack for Microtiter deep well
96 plate
(tip combs, plates, and elution strips for 96 samples)
1 box

Thermo Scientific KingFisher Pure RNA Blood Kit |9Thermo Fisher Scientific
Product Description
Introduction
The KingFisher Pure RNA Blood Kit is designed for rapid automated RNA
purification from up to 200 µl of mammalian blood samples using Thermo
Scientific™ KingFisher™ instruments. See the detailed list below.
1) Fresh or frozen whole human blood samples anticoagulated by EDTA
(ethylenediaminetetraacetic acid) or citrate, and samples stabilized by
commercial stabilizers PAXgene or Tempus
2) Fresh, frozen, or stabilized (PAXgene and Tempus) blood of different
species: mouse, rabbit, canine, horse, cow, sheep, and goat
3) Human buffy coat, blood leucocytes, erythrocytes, and bone marrow samples
The RNA purified using the KingFisher Pure RNA Blood Kit is of high quality
and free of proteins, nucleases, and other contaminants or inhibitors. It is,
therefore, suitable for direct use in many different downstream applications,
such as RT-qPCR (reverse transcription quantitative PCR), RT-PCR, and
several other enzymatic reactions.
Intended Use
The KingFisher Pure RNA Blood Kit is developed for the purification of RNA from
blood samples using paramagnetic particles. The reagents and specific plastic
consumables are designed for use with the KingFisher Flex and KingFisher Duo
magnetic particle processors as part of an integrated system. The KingFisher
Pure RNA Blood Kit enables extraction of RNA from fresh or stored blood. The
KingFisher Pure RNA Blood Kit is only intended for research use, not for clinical
or diagnostic use. The user is responsible for validating the performance of the
2

10 |Thermo Scientific KingFisher Pure RNA Blood Kit Thermo Fisher Scientific
Chapter 2 |Product Description
Thermo Scientific™ KingFisher™ instrument and the KingFisher Pure RNA
Blood Kit for any particular use, as the performance of the kits has not been
validated for any specific organism or downstream application.
Principle and Procedure
The KingFisher Pure RNA Blood Kit uses magnetic-particle technology for
RNA purification. The Thermo Scientific™ KingFisher™ technology combines
the speed and efficiency of RNA purification with easy handling of magnetic
particles. The purification process requires no phenol/chloroform extraction
and needs very little hands-on time.
The first step of the protocol lyses the cells, after which the NA (nucleic acid)
can bind to the surface of the KingFisher Magnetic Beads in the presence of a
chaotropic salt. Copurified DNA is removed during a DNase I treatment step.
The following effective wash steps dispose of proteins, cell debris, and any
residual contaminants, while the RNA bound to the KingFisher Magnetic
Beads is transferred through the wash steps.
Two different Wash Buffers are used, followed by an air drying step. High-
quality RNA is eluted into nuclease-free water, and is ready for subsequent
downstream processes.
Kit Specifications
The KingFisher Pure RNA Blood Kit is designed for rapid automated
preparation of highly pure total RNA from up to 200 µl of blood samples
using KingFisher magnetic particle processors.
If a dispense step requiring the addition of Rebinding Buffer is excluded, the
approximate processing time is 45 min for the purification of 96 samples
on the KingFisher Flex and 12 samples on the KingFisher Duo. The obtained
RNA can be used directly in various downstream applications.
Fresh or stored blood samples can be used. Suitable sample storage is
essential for obtaining a high yield and good quality total RNA.
Typically 1.5-4µg of total RNA can be purified from a 200 µl volume of
blood sample with an A260/A280 ratio of ≥ 1.8–2.1. The yields of acquired
purified RNA depend on the sample type, and the method of sample
collection, and storage. Refer to Appendix B for typical total RNA yields from
various sources.

Thermo Scientific KingFisher Pure RNA Blood Kit |11Thermo Fisher Scientific
Product Description |Chapter 2
KingFisher Magnetic Particle Processors
The KingFisher magnetic particle processors are designed for the automated
transfer and processing of magnetic particles in microplate format. The
patented technology of the Thermo Scientific™ KingFisher™ systems is based
on the use of magnetic rods covered with a disposable, specially designed
tip comb and plates or tubes. Use only Thermo Scientific™ KingFisher™
plastic consumables, as use of products from other manufacturers may
cause unsuitable mixing or even instability in the KingFisher instrument. The
instrument functions without any dispensing or aspiration parts or devices.
Samples and reagents, including magnetic particles, are dispensed onto the
plates according to the corresponding instructions. Dispensing can be carried
out manually or partially automatically using automatic dispensers, for example,
the Thermo Scientific™ Multidrop™ Combi and/or the Thermo Scientific™
Versette™. Thermo Scientific™ BindIt™ Software 3.2 can be used for running
ready-made and optimized protocols for the Thermo Scientific™ KingFisher™
Pure Kits. It is also possible to transfer the developed protocol onto the onboard
software and run it directly from the instrument. The KingFisher instruments
provide a rapid and automated solution for complicated and time-consuming
purification processes, resulting in high-purity RNA without risk of carryover
or cross-contamination.
The KingFisher instrument family comprises four systems covering working
volumes from 20 to 5000 µl. Each system consists of an instrument, specially
designed plastic consumables, and the easy-to-use BindIt Software 3.2.
The KingFisher Pure RNA Blood Kit is optimized and ready for use with the
KingFisher Flex or KingFisher Duo.
KingFisher magnetic particle processors are intended for professional
research use by trained personnel. Detailed information and user instructions
for the KingFisher instruments can be found in their respective user manuals.
The BindIt Software 3.2 protocols optimized for the KingFisher Pure RNA
Blood Kit are available for the KingFisher Flex 96 and 24 and KingFisher Duo.
For more information, go to www.thermoscientific.com/kingfisherinfo or
contact your local authorized distributor.

12 |Thermo Scientific KingFisher Pure RNA Blood Kit Thermo Fisher Scientific
Chapter 2 |Product Description
Table 2-1. Overview of KingFisher Flex and KingFisher Duo magnetic
particleprocessors
KingFisher Flex KingFisher Duo
96 deep well
format
24 format 12 format 6 format
Processing
volume 50–1000 µl* 200–5000 µl 50–1000 µl* 200–5000 µl
Capacity Up to 96
samples per
run (sample
volume approx.
200 µl)
Up to 24
samples per
run (sample
volume approx.
1 ml)
Up to 12
samples per
run (sample
volume approx.
200 µl)
Up to 6
samples per
run (sample
volume approx.
1 ml)
Magnetic head 96inter-
changeable
formats for
Microtiter deep
well 96 plate,
PCR plate and
KingFisher Flex
96 KF plate
24 format for
KingFisher Flex
24 deep well
plate
12-pin magnet
head for
Microtiter deep
well 96 plate
6-pin magnet
head for
KingFisher Flex
24 deep well
plate
Plates KingFisher Flex
96 KF plate
(20–200 µl),
96 well PCR
plate, skirted
(20–100 µl),
Microtiter deep
well 96 plate
(50–1000 µl)
KingFisher Flex
24 deep well
plate
(200–5000 µl)
Microtiter deep
well 96 plate
(50–1000 µl),
KingFisher Duo
elution strip
(30–130 µl)
KingFisher Flex
24 deep well
plate
(200–5000 µl)
Tip combs KingFisher Flex
96 tip comb for
PCR magnets,
KingFisher Flex
tip comb for KF
magnets,
KingFisher Flex
96 tip comb for
deep well
magnets
KingFisher Flex
24 tip comb for
deep well
magnets
KingFisher Duo
12-tip comb
KingFisher Duo
6-tip comb
Heating
temperature
Heating block temperature from
+5°C above ambient room
temperature to +115°C
Heating block temperature from
+10°C to +75°C, elution strip
+4°C to +75°C at room
temperature
* See the details above on the Plates row.

Thermo Scientific KingFisher Pure RNA Blood Kit |13Thermo Fisher Scientific
Safety Information
The following components of the KingFisher Pure RNA Blood Kit contain
hazardous contents (Table 3-1).
Always wear a laboratory coat, disposable gloves and goggles, and follow the
safety instructions provided in the kit instruction manual. It is recommended
that Good Laboratory Practice (GLP) is followed to guarantee reliable
analyses.
Table 3-1. Safety precautions
Reagent Hazardous contents Safety instructions
Lysis Buffer Guanidium thiocyanate Harmful by inhalation. Liberates
very toxic gas in contact with
acids. Harmful to aquatic
organisms and may cause
long-term adverse effects in the
aquatic environment.
Keep the container in a
well-ventilated place. Do not
breathe gas/fumes/vapor/spray.
Wear suitable protective clothing
and gloves. This material and its
container must be disposed of as
hazardous waste. Avoid release to
the environment. Refer to special
instructions/safety data sheets.
3
Continued

14 |Thermo Scientific KingFisher Pure RNA Blood Kit Thermo Fisher Scientific
Chapter 3 |Safety Information
Reagent Hazardous contents Safety instructions
Proteinase K Proteinase, Tritirachium album
serine
May cause sensitization by
inhalation.
Do not breathe gas/fumes/vapor/
spray. Wear suitable protective
clothing. In case of accident or if
you feel unwell, seek medical
advice immediately. This material
and its container must be
disposed of as hazardous waste.
Rebinding Buffer
(conc.)
Sodium perchlorate Harmful if swallowed. Explosive
when mixed with combustible
material. Keep away from
combustible material. Do not
breathe gas/fumes/vapor/spray.
Take off immediately all
contaminated clothing. Wear
suitable protective clothing. This
material and its container must be
disposed of as hazardous waste.
Wash Buffer 1
(conc.)
Guanidium chloride Harmful if swallowed. Irritating to
eyes and skin.
Do not breathe gas/fumes/vapor/
spray. In case of contact with
eyes, rinse immediately with
plenty of water and seek medical
advice. Wear suitable protective
clothing and gloves. This material
and its container must be
disposed of as hazardous waste.
Cont.

Thermo Scientific KingFisher Pure RNA Blood Kit |15Thermo Fisher Scientific
4
Storage Conditions and
Preparation of the Reagents
Storage Conditions
Upon arrival of the kit, store the DNase I, DNase I Reconstitution Buffer,
and 2 x DNase Buffer at -20°C. The Proteinase K solution is stable at room
temperature until the seal of the vial is broken. After being opened, the vial
should be stored at -20°C. Store the KingFisher Magnetic Beads at +4°C.
Other kit components can be stored at room temperature (15−25°C). The
reagents are stable for up to two years from the manufacturing date.
Preparation of the Lysis Buffer
Before each RNA purification experiment, a fresh aliquot of Lysis Buffer
should be supplemented with 2 M DTT solution (not provided). It is required
to use 200µl of Lysis Buffer for the purification of one sample. Add 20 µl of
2MDTT to 1 ml of Lysis Buffer.
Preparation of the Wash Buffers and
Rebinding Buffer
Add 100% isopropanol and 96−100% ethanol to the Wash Buffer 1, Wash
Buffer 2, and Rebinding Buffer, as indicated below in Table 4-1 prior to the
first use.

16 |Thermo Scientific KingFisher Pure RNA Blood Kit Thermo Fisher Scientific
Chapter 4 |Storage Conditions and Preparation of the Reagents
Table 4-1. Instructions for the preparation of Wash Buffer 1, Wash Buffer2,
and Rebinding Buffer. Add the indicated volume of 100% isopropanol or
96−100% ethanol to each bottle.
Wash Buffer 1 Wash Buffer 2 Rebinding Buffer
Concentrated buffer 100 ml 30 ml 25 ml
Ethanol (96−100%) −120 ml −
Isopropanol (100%) 90 ml −33.4 ml
Total volume 190 ml 150 ml 58.4 ml
After preparing each solution, mark the bottle to indicate that the step has
been completed. The buffers can be stored at room temperature.
Preparation of the DNase I
StorageSolution
To prepare the DNase I storage solution, add 1100 µl of DNase I Reconstitution
Buffer to each vial of lyophilized DNaseI. Incubate at room temperature for
5min. Occasional gentle rotation of the vial helps to dissolve the DNaseI, but
avoid forceful mixing. Store the DNaseI storage solution at -20°C. Repeated
freezing and thawing should be avoided.
Preparation of the DNase I
WorkingSolution
Calculate the amount of DNase I working solution needed. For the purification
of one sample, mix 35 µl of 2 x DNase I Buffer, 1.5 µl Manganese Chloride
Solution, 10 µl of DNase I storage solution, and 23.5 µl of nuclease-free water.
The DNase I working solution should be used immediately after preparation.
Starting Material Handling and Storage
RNA purification from blood is recommended to be carried out on the
day of collection. Fresh blood samples collected in anticoagulants
(ethylenediaminetetraacetic acid (EDTA) or citrate) containing vials are not
recommended to be stored at +4°C for longer than six hours. Aliquots
of fresh blood samples, if frozen immediately, can be stored at -80°C for
several months.
Blood samples collected in PAXgene or Tempus tubes should be stored
according to the manufacturer’s instructions.

Thermo Scientific KingFisher Pure RNA Blood Kit |17Thermo Fisher Scientific
Protocols and
PipettingInstructions
Before beginning the RNA purification protocol, carefully read through the
Thermo Scientific™ KingFisher™ Flex User Manual (Cat. No. N07669), the
Thermo Scientific™ KingFisher™ Duo User Manual (Cat. No. N12420) or
the
Thermo Scientific™ KingFisher™ mL User Manual (Cat. No. 1508260),
and the
Thermo Scientific™ BindIt™ Software for KingFisher Instruments
version 3.2 User Manual
(Cat. No. N07974).
BindIt Software protocols for the KingFisher Pure RNA Blood Kit can be found
in BindIt Software 3.2 and at www.thermoscientific.com/kingfisher.
Handling of KingFisher Magnetic Beads
A homogeneous distribution of the KingFisher Magnetic Beads in the container
is essential before the beads are transferred to the wells or tubes in order
to ensure a high consistency between the wells or tubes. To gain complete
resuspension of the beads, shake the container vigorously or vortex briefly.
Avoiding Ribonuclease (RNase)
Contamination
RNA purity and integrity is essential for downstream applications. RNase is a
ubiquitously found enzyme, which degrades RNA. RNases are highly stable
contaminants found in any laboratory environment. Keep all kit components
tightly sealed when not in use.
Skin is a common source of RNases. Always wear gloves when handling
reagents and RNA samples. Use sterile, RNase-free pipette tips when working
with RNA. Remove RNase contamination from work surfaces and non-disposable
items (pipettes, centrifuges) with reagents designed to remove RNase.
5

18 |Thermo Scientific KingFisher Pure RNA Blood Kit Thermo Fisher Scientific
Chapter 5 |Protocols and PipettingInstructions
Instructions for KingFisher Flex with
96Deep Well Plates
These instructions are intended for RNA purification from 200 µl of whole
blood, using the KingFisher Pure RNA Blood Kit (Cat. No. 98020196) and the
KingFisher Flex with Thermo Scientific™ Microtiter™ deep well 96 plates.
When using the KingFisher Pure RNA Blood Kit for the first time, prepare the
DNase I storage solution, Rebinding Buffer, Wash Buffer 1, and Wash Buffer2.
For each run, prepare the DNase I working solution and Lysis Buffer with
2M DTT. For more instructions, refer to Chapter 4: “Storage Conditions and
Preparation of the Reagents”.
Check all the solutions in the kit for salt precipitation before each use.
Redissolve precipitates by warming the solution at 37°C and equilibrate to
room temperature (15−25°C).
Blood samples of certain species, e.g. mouse, contain a high amount of
RNA. With such species, it is recommended to use up to 50 µl of blood
sample to obtain RNA of equal yield and purity. When working with less than
a 200 µl volume of blood sample, it is recommended to equalize the volume
by adding Lysis Buffer, thus bringing the total volume to 400 µl.
1. Take six empty Microtiter deep well 96 plates and two empty Thermo
Scientific™ KingFisher™ Flex 96 KF plates.
2. Fill the plates as follows.
Plate
number Plate type Plate name Content Reagent volume
per well
1
Microtiter deep
well 96 plate
Sample Lysis Buffer
Blood sample
Proteinase K
200 µl
200 µl
20 µl
2Wash 1_1 Wash Buffer 1 900 µl
3DNase DNase I working
solution
70 µl
4Wash 1_2 Wash Buffer 1 700 µl
5Wash 2_1 Wash Buffer 2 700 µl
6Wash 2_2 Wash Buffer 2 700 µl
7KingFisher Flex
96 KF plate
Elution Nuclease-free
water
75 µl

Thermo Scientific KingFisher Pure RNA Blood Kit |19Thermo Fisher Scientific
Protocols and PipettingInstructions |Chapter 5
3. Place a Thermo Scientific™ KingFisher™ Flex 96 tip comb for deep
well magnets on a Tip Plate (i.e. an empty KingFisher Flex 96 KF plate).
4. Start the PURE_RNABlood_Flex96 protocol using the KingFisher Flex 96
and load the plates as instructed on the KingFisher Flex 96 instrument
display.
Switch on the KingFisher Flex making sure that you are using the Thermo
Scientific™ KingFisher™ Flex 96 deep well head and heating block.
Connect the PC with BindIt Software 3.2 to the KingFisher Flex. Start the
PURE_RNABlood_Flex96 protocol. Insert the Tip Plate and the filled plates
into the instrument as indicated on the KingFisher Flex display. After all the
plates have been loaded into the instrument, the protocol will start.
5. When the KingFisher Flex is to be run as a standalone instrument,
transfer the PURE_RNABlood_Flex96 protocol to the KingFisher Flex.
The instructions for transferring the protocol can be found in Chapter 4:
“Using the software” in the
BindIt Software for KingFisher Instruments
version 3.2 User Manual
.
6. Add the KingFisher Magnetic Beads and isopropanol to the Sample plate
during the first dispense step.
When the KingFisher Flex pauses at the dispense step after the lysis step at
approximately 5 minutes after starting the protocol run, remove the Sample
plate from the instrument, and add the KingFisher Magnetic Beads and
isopropanol to the Sample plate.
Plate name Add Added reagent volume
perwell
Sample Isopropanol
KingFisher Magnetic Beads*
400 µl
15 µl
* Resuspend the KingFisher Magnetic Beads well by vortexing before use.
7. Place the Sample plate back into the instrument and press Start.
8. Add the Rebinding Buffer (supplemented with isopropanol) to the
Sample plate during the second dispense step.

20 |Thermo Scientific KingFisher Pure RNA Blood Kit Thermo Fisher Scientific
Chapter 5 |Protocols and PipettingInstructions
When the KingFisher Flex pauses at the second dispense step after the
DNase step at approximately 10 minutes after the first dispense step,
remove the DNase plate from the instrument, and add the Rebinding Buffer
(supplemented with ethanol) to the DNase plate to rebind the RNA.
Plate name Add Added reagent volume
per well
DNase Rebinding Buffer 490 µl
9. Place the DNase plate back into the instrument and press Start. After
the pause, the protocol will continue to completion.
10. When the protocol is completed, remove the plates according to the
instructions on the KingFisher Flex display and switch off the instrument.
The purified RNA is ready for use in downstream applications. When
working with RNA, keep the purified samples on ice. Store the purified
RNA at -20°C or -80°C.
NOTE: The final RNA concentration in the nuclease-free water may
increase if the purified RNA is eluted into a smaller than recommended
volume of water, but this can slightly reduce the overall RNA yield.
Instructions for KingFisher Duo with 12-pin
Magnet Head
These instructions are intended for RNA purification from 200 µl of blood,
using the KingFisher Pure RNA Blood Kit (Cat. No. 98020196) and the
KingFisher Duo with 12-pin magnet head.
When using the KingFisher Pure RNA Blood Kit for the first time, prepare
the DNase I storage solution, Rebinding Buffer, Wash Buffer 1, and Wash
Buffer2. For each run, prepare the DNase I working solution and Lysis Buffer
with 2M DTT. For more instructions, refer to Chapter 4: “Storage Conditions
and Preparation of the Reagents”.
Check all the solutions in the kit for salt precipitation before each use.
Redissolve precipitates by warming the solution at 37°C and equilibrate to
room temperature (15−25°C).
1. Take one empty Microtiter deep well 96 plate and one Thermo Scientific™
KingFisher™ Duo elution strip.