EM Quant® Chloride Test, Catalog No. 10079
Test strips for the detection and
semi-quantitative determination of chloride ions
1. Method
Chloride ions react with silver ions,
decolorizing red-brown silver chromate. The concentration of chloride
is measured semiquantitatively by visual comparison of the
reaction zones of the test strip with the individual color rows of a
color scale.
2. Measuring Range and Number of Determinations
Measuring Range/Color Scale
Graduation1 |
Number of Determinations |
500 - 1,000 - 1,500 - 2,000 - 3,000
mg/l (ppm) Cl– |
100 |
1 for measurement of concentrations>3,000mg/l Cl– see section 7
4. Applications
EM Quant® analytical test strips
are designed for preliminary tests and for the determination of
graduated concentration ranges. The test is particularly recommended
for the determination of the chloride content in conjunction with COD
determination.
Sample material:
Wastewater
Groundwater and surface water
Food
5. Influence of foreign substances
The concentrations of foreign substances given
in the table lie below the limit at which the determination is
interfered with.
Concentrations of Foreign Substances ppm (mg/l)
| Acetate |
1,000 |
Mg2+ |
1,000 |
EDTA |
1,000 |
| Ag+ |
75 |
Mn2+ |
1,000 |
|
|
| Al3+ |
1,000 |
Na+ |
1,000 |
|
|
| Ascorbate |
10 |
NH4+ |
1,000 |
|
|
| BO3– |
1,000 |
Ni2+ |
1,000 |
|
|
| Br– |
75 |
NO2– |
1,000 |
|
|
| Ca2+ |
1,000 |
NO3– |
1,000 |
|
|
| Cd2+ |
1,000 |
OCN– |
1,000 |
|
|
| Ce3+ |
1,000 |
Oxalate |
1,000 |
|
|
| Citrate |
1,000 |
Pb2+ |
1,000 |
|
|
| CN– |
20 |
PO43– |
1,000 |
|
|
| CO32– |
1,000 |
S2– |
20 |
|
|
| Cr3+ |
1,000 |
SCN– |
100 |
|
|
| CrO42– |
1,000 |
Sn2+ |
1,000 |
|
|
| Cu2+ |
1,000 |
SO32– |
1,000 |
|
|
| Fe2+ |
1,000 |
SO42– |
1,000 |
|
|
| Fe3+ |
1,000 |
S2O32– |
75 |
|
|
| Hg2+ |
75 |
Tartrate |
1,000 |
|
|
| I– |
100 |
Zn2+ |
1,000 |
|
|
| K+ |
1,000 |
|
|
|
|
6. Reagents and auxiliaries
Store original sealed packs in refrigerator.
Opened packs: store closed container outside the
refrigerator in a cool, dry place.
The test strips are stable at least up to the
date stated on the pack when stored under these conditions.
Package contents: 100 analytical test strips.
Other reagents and accessories:
Universal indicator strips pH 0-14, Cat. No. 9590
Sodium hydroxide solution 1 mol/l, Cat. No. 9956
Chloride standard solution-ready to use
1,000 mg/l Cl–, Cat. No. 19897
6. Preparation
· The pH of the sample solution must be
within the range 5-8. Adjust, if necessary, with sodium hydroxide
solution or nitric acid.
· Moisten solid sample material with
distilled water.
7. Procedure
- Remove 1 analytical test strip and immediately
reclose the tube.
- Immerse test strip with all reaction
zones briefly (approximately 1 second) in sample solution or
else bring into contact with moistened solid sample material.
- Gently shake off excess liquid from the test strip.
· After 1 minute compare color
pattern of the reaction zones with the color rows on the label.
Determine which row color pattern coincides most exactly and read off
the corresponding concentration value. If an exact color match cannot
be achieved, estimate an intermediate value.
Notes on the measurement:
- In cases in which the color pattern on the
test strip corresponds with the color row for 3,000 mg/l Cl–,
the chloride concentration may actually be considerably higher. For
this reason, the sample solution in question should be successively
diluted in 1:10 steps until a value less than 3,000 mg/l Cl–
is obtained.
- It is advisable to regard the results gained
using moistened solid sample material only as guide values.
- The color pattern of the reaction zones may
change after the specified reaction time has elapsed. This must not
be considered in the measurement and does not impair the function of
the test strips.
8. Method control
To check test strips and procedure:
Analyze chloride standard solution (1,000mg/l
Cl–) as described in section 7.
Package Size
10079 EM Quant® Test strips
Chloride Test for 100 determinations
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