Horiba Scientific LAQUA 6581S-10C User manual

Instruction Manual
Combination type Nitrate Ion
Selective Electrode
6581S-10C
ELECTRODE
Distributed by: ABQ Industrial LP USA
Tel: [phone] eFax: [phone]
Web: https://www.abqindustrial.net E-mail: [email protected]

CODE:GZ0000452163
April, 2017 © 2017 HORIBA Advanced Techno Co., Ltd.
Preface
This manual describes operation of the combination type nitrate ion selective
electrode.
Be sure to read this manual before using the product to ensure proper and safe
operation of the product.
Also safely store the manual so it is readily available whenever necessary.
Please contact HORIBA Advanced Techno if any points regarding safety come
to your attention during use.
Product specifications and appearance, as well as the contents of this manual
are subject to change without notice.
Warranty and responsibility
This product is not covered by warranty because it is a consumable item.
HORIBA Advanced Techno Co., Ltd. SHALL NOT BE LIABLE FOR ANY
DAMAGES RESULTING FROM ANY MALFUNCTIONS OF THE
PRODUCT, ANY ERASURE OF DATA, OR ANY OTHER USES OF THE
PRODUCT.
Trademarks
QR Code is a trademark of DENSO WAVE INCORPORATED.
Other company names and brand names are either registered trademarks
or trademarks of the respective companies. (R), (TM) symbols may be
omitted in this manual.
Regulations
Conformable standards
This equipment conforms to the following standards:
RoHS: EN50581
9. Monitoring and control instruments
Authorised representative in EU
HORIBA UK Limited
2 Dalston Gardens, Stanmore,
Middx HA7 1BQ, UK

For your safety
Hazard classification and warning symbols
Warning messages are described in the following manner. Read the
messages and follow the instructions carefully.
Hazard classification
Warning symbols
This indicates an imminently hazardous
situation which, if not avoided, will result in
death or serious injury. This is to be limited to
the most extreme situations.
This indicates a potentially hazardous
situation which, if not avoided, could result in
death or serious injury.
This indicates a potentially hazardous
situation which, if not avoided, may result in
minor or moderate injury. It may also be used
to alert against unsafe practices.
Description of what should be done, or what should be
followed
Description of what should never be done, or what is
prohibited

Safety precautions
This section provides precautions for using the product safely and correctly
and to prevent injury and damage. The terms of DANGER, WARNING, and
CAUTION indicate the degree of imminency and hazardous situation. Read
the precautions carefully as it contains important safety messages.
Precautions for chemicals
Solutions used for calibration and measurement must not
come in contact with the skin, or consumed.
These solutions stimulate the eyes and skin. If these
solutions come in contact with your skin or eyes, flush
immediately with running water.
If you drink these solutions by accident, immediately seek
medical advice.
When you handle these solutions, make sure to wear latex
gloves, protective glasses, etc.

Product handling information
Operational precautions
Use of the product in a manner not specified by the manufacturer may
impair the protection provided by the product. And it may also reduce
product performance.
Exercise the following precautions:
Use the supplied internal solution for the reference electrode. Using any
other internal solutions may cause measurement errors.
If the ion selective membrane is dry, soak the electrode in pure
(deionized) water for at least one hour. Using it in a dry state will cause
measurement errors.
Do not get the electrode connector wet or touch it with dirty hands. It may
cause a failure.
Do not touch a hard surface with the electrode. It may cause a failure.
Only use the product including accessories for their intended purpose.
HORIBA Advanced Techno assumes no liability when they are used for
any other products.
Disposal of the product
When disposing of the product, follow the related laws and/or regulations of
your country.

Manual information
Description in this manual
The following explains the icons used in this manual.
Original language
This is the English translation of an original Japanese document.
Documents related to this product
The following documents are related to this product.
Combination type Nitrate Ion Selective Electrode
Instruction Manual (this manual)
This manual mainly discusses how to operate the combination type nitrate
ion selective electrode.
Meter Instruction Manual
This manual mainly discusses how to operate the meter to which the
combination type nitrate ion selective electrode is connected.
Electrode Stand Instruction Manual
This manual mainly discusses how to operate the electrode stand which
holds the combination type nitrate ion selective electrode.
Icon Meaning
This interprets the necessary points for correct
operation and notifies the important points for
handling the product.
This indicates reference information.
This indicates the part where to refer for
information.
This indicates that you can access the instruction
video on the web page.
Access the webpage by using the QR Code.
Note
Note
TipTip
View videoView video

Before Use 1
Confirmation of the items included in the package . . . . . . . 2
About this product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Measurement procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrode Preparation 9
Assembling the electrode (only when use for first time) . . 10
Filling with internal solution . . . . . . . . . . . . . . . . . . . . . . . . 12
Rinsing the electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Connecting the electrode to the meter . . . . . . . . . . . . . . . 16
Calibration 17
Standard solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Calibration operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Measurement 29
Requirements for sample and standard solutions . . . . . . . 30
Measurement hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Measurement units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Measurement operation . . . . . . . . . . . . . . . . . . . . . . . . . . 32
After Measurement 37
How to clean the electrode . . . . . . . . . . . . . . . . . . . . . . . . 38
Contents

Maintenance 43
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Troubleshooting 47
When accurate measurement is not possible . . . . . . . . . . 48
Reference 53
Ion selective electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Measurement principle of ion selective electrode . . . . . . . 56
Characteristics of nitrate ion selective electrode . . . . . . . . 60
Material 67
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
External dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Consumables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Figures
Fig. 1 Included items. . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Fig. 2 System configuration. . . . . . . . . . . . . . . . . . . . . . 3
Fig. 3 Names of parts . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fig. 4 Structure of combination type
ion selective electrode. . . . . . . . . . . . . . . . . . . . 54
Fig. 5 State of liquid junction of reference electrode. . 55
Fig. 6 Relationship between monovalent cation
concentration (activity) and electrode potential. 57
Fig. 7 Difference in state of solution depending on ion
concentration. . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Fig. 8 Calibration curve of nitrate ion selective
electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Tables
Table 1 NO3-concentration measurement
unit conversion table . . . . . . . . . . . . . . . . . . . . 31
Table 2 Check list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 3 Electrode types . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 4 (Example) Activity coefficient for monovalent ion
concentration . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 5 Relationshipbetweentemperature of ion selective
electrode and theoretical slope . . . . . . . . . . . . 62
Table 6 Relationship between temperature of
chloride ion selective electrode and theoretical
slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 7 Substances that cause a 10% error
in the reading, and their concentrations . . . . . 64
Table 8 Specifications of combination type nitrate ion
selective electrode . . . . . . . . . . . . . . . . . . . . . . 68
Table 9 Consumables. . . . . . . . . . . . . . . . . . . . . . . . . . 70

Before Use
B efore Use
This chapter describes what you should know before using the product.
Confirmation of the items included in
the package ...................................... 2
About this product ........................... 3
Product features...........................................................3
System configuration ...................................................3
Names of parts.............................................................4
Measurement procedure ................. 5

2
Confirmation of the items included
in the package
Open the package and make sure that the following items are included.
Fig. 1 Included items
This product is a consumable item. For details on purchasing an electrode and
reagent, refer to "Consumables" ( page 70).
1000 mg/L standard solution
(50 mL)
100 mg/L standard solution
(50 mL)
Internal solution
(50 mL)
Syringe
Protective pipe
Instruction
manual
(this document)
Ion electrode tip (2 units)
Ionic strength adjuster

(50 mL)
Dropper
Main unit
of electrode
: Referred to as ISA in the rest of
this document

3
Before Use
About this product
Product features
The combination type nitrate ion selective electrode is an electrode that
combines a tip type ion electrode with a reference electrode.
This product has the following features.
Ion concentration can be measured with this one electrode. There is no
need to use a pair of an ion selective electrode and reference electrode.
The reference electrode part has a double junction structure. This
minimizes the contamination of the sample solution by the internal
solution outflow, the interference on the electrode potential, and so on.
Since the structure of the liquid junction, movable sleeve type, is capable
of eliminating clogging by contaminants, it is possible to measure the
concentration accurately.
System configuration
This product is used with the meter of HORIBA Advanced Techno
connected, which is sold separately.
Electrode stand(*) is also available.
Fig. 2 System configuration
Refer to the meter instruction manual for more details.
MeterMeter
ElectrodeElectrode
* This stand is optional for the portable meter.
Electrode stand *
Desktop type Portable type

4
Names of parts
This product consists of the parts shown in the figure below.
Fig. 3 Names of parts
* Use the protective pipe for protecting the ion electrode tip.
Attaching it for measurements outdoors will protect the ion electrode tip
against damage from gravel or other foreign matters.
If there is no risk of damage, it is not required to attach it.
Ion selective
membrane
Liquid junction
When the ion electrode tip is
attached
Electrode connector
(BNC connector)
Protective cap
Protective pipe *
Ion electrode tip
Internal solution
fill port Internal
solution
chamber
Support pipe
Electrode cap
Cable
Rubber cap
(to be removed
before use)

5
Before Use
Measurement procedure
The following figure shows the procedure for measuring the No3-concentration.
1Measurement preparation
1
2
4
3
Meter
Fill with internal solution.
( page 12)
Connect the electrode to the meter.
( page 16)
Attach the ion
electrode tip.
( page 10)
Rinse with pure water.
( page 15)

6
2Calibration
Before the first use
Before use after storage for two
weeks or longer
If the electrode is less responsive
3Measurement
In the following cases, perform
conditioning of the electrode before
calibration.
For details on conditioning, refer to
“Conditioning of the electrode”
( page 23).
1
2
Perform calibration.
( page 22)
Prepare two types of
solutions for calibration.
( page 19)
1
2
Prepare the sample solution.
( page 34)
Perform measurement.
( page 35)

7
Before Use
4After measurement
When the electrode will not be used for two weeks or
longer, store it as described on page 44.
2
1
Rinse the electrode
with pure water.
( page 42)
Discharge the internal solution
from the electrode.
( page 41)
NoteNote

8

Electrode Preparation
Calibration Measurement
After Measurement
E lectrode Preparation
This chapter describes the preparation that must be performed before
using the product.
Assembling the electrode (only when
use for first time)............................ 10
Filling with internal solution ......... 12
Rinsing the electrode..................... 15
Connecting the electrode to the
meter ............................................... 16

10
Assembling the electrode (only
when use for first time)
When using the product for the first time, assemble the
electrode as described in the following procedure.
1Remove the protective cap.
2Remove the rubber cap.
The rubber cap will not be used again. Dispose of it according to
the local rules and regulations.
View videoView video
Item to be prepared
Ion electrode tip
Protective cap
Rubber cap
TipTip