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Chlorine Test Low Range 0.5-20ppm EM Quant (1 PK of 75)

179251
$306.53
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Chlorine Test Low Range 0.5-20ppm EM Quant  (1 PK of  75) MAIN

EM Quant® Chlorine Test Strips Low Range 0.5-20 ppm, 17925

Additional Production Information
Method: Color scale
Color Reaction: Chlorine oxidizes an organic compound to form a violet dye. The chlorine concentration is measured semi-quantitatively by visual comparison of the reaction zone of the analytical test strip with the fields of a color scale.
Graduation: 0-0.5-1-2-5-10-20 ppm
Determinations: 75
Storage Conditions: +2 to +8°C
Shelf Life: 18 months (from day of production)

EM Quant® Chlorine Test, Catalog No. 17925/1
1. Method
Chlorine oxidizes an organic compound to form a violet dye. The chlorine concentration is measured semiquantitatively by visual comparison of the reaction zone of the analytical test strip with the fields of a color scale.

2. Measuring Range and Number of Determinations

Measuring Range/Color Scale Graduation Number of Determinations
0.5 - 1 - 2 - 5 - 10 - 20mg/l Cl2 75

 

 


3. Applications
Sample Material:
Bleaching solutions
Disinfectant solutions
Rinsing solutions

4. Influence of Foreign Substances
The concentrations of foreign substances given in the table lie below the limit at which the color comparison is made more difficult:

Concentrations of Foreign Substances in mg/l or %
Al3+ 500
Ca2+ 1000
CN- 0.2
Cr3+ 1000
Cr2O72- 100
Cu2+ 250
Fe3+ 1000
NO2- 0.5
S2- 0.1
Br2 0.05
I2 0.5
H2O2 0.5
NaCl 25%
NaNO3 1000
Na2SO4 10%
 

 

















5. Reagents and Auxiliaries
The analytical test strips are stable at least up to the date stated on the pack when stored in the closed tube at +2 to +8°C.
Package Contents:

Tube containing 75 analytical test strips

Other Reagents:
Dichloroisocyanuric acid sodium salt dihydrate GR for analysis, Cat. No. 1.10888.0100 (Merck KGaA, Darmstadt, Germany)

6. Preparation
Samples containing more than 20mg/l Cl2 must be diluted with distilled water. Alternatively, it is also possible to use the EM Quant® Chlorine Test, Cat. No. 17924/1 (measuring range 25-500mg/l Cl2).

7. Procedure
Immerse the reaction zone of the analytical test strip in the measurement solution for approximately 2 seconds.
Shake off excess liquid from the test strip and immediately determine with which color field on the label the color of the reaction zone coincides most exactly.
Read off the corresponding result in mg/l Cl2. If an exact color match cannot be achieved, estimate an intermediate value.

Notes on the Measurement:
The color of the reaction zone may continue to change after the specified reaction time has elapsed. This must not be considered in the measurement.
If the color of the reaction zone is equal to or more intense than the darkest color on the scale, repeat the measurement using fresh, diluted samples until a value of less than 20mg/l Cl2 is obtained. This must then be multiplied by the corresponding dilution factor.
8. Method Control
To check analytical test strips and handling:
Dissolve 1.85g of dichloroisocyanuric acid sodium salt dihydrate in distilled water, make up to 1000ml with distilled water, and mix. Content: approximately 1000mg/l free chlorine.
(The exact chlorine content can be determined titrimetrically according to EN ISO 7393-3.)
Dilute this standard solution to 10mg/l Cl2 and analyze as described in section 7.

9. Note:
Reclose the tube containing the test strips immediately after use.

 

 



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