MACHEREY-NAGEL QUANTOFIX Chlorine Sensitive Test Strip Instructions
- June 12, 2024
- MACHEREY-NAGEL
Table of Contents
MACHEREY-NAGEL QUANTOFIX Chlorine Sensitive Test Strip
Description
QUANTOFIX® Chlorine Sensitive are test strips for the semiquantitative
determination of total chlorine in solutions.
Measuring range
- Visually 0.1–10 mg/L Cl2
- Reflectometrically 0.1–10 mg/L Cl2
Color gradation: 0 · 0.1 · 0.5 · 1 · 3 · 10 mg/L Cl2
Pack content
1 aluminum container with 100 test strips
Hazard warnings: This test does not contain hazardous substances that must be labelled.
Reaction‘s principle:
Total chlorine reacts with the potassium iodide and the organic redox
indicator contained in the test field, forming a green color.
General indications
Remove only as many test strips as are required. Close the container
immediately after removing a strip. Do not touch the test field.
Instructions for use:
- Dip the test strip into the sample solution, moving back and forth for 15 sec.
- Shake off excess liquid.
- Compare the test field with the color scale. Take the value which matches closest with the colored test field (reading accuracy: ± ½ colored field of the scale).
The reaction color of the test fi eld may change after the value has been taken. It is therefore crucial to evaluate the coloration within the prescribed time scale in order to achieve a correct result.
Quality control
To check the correct functioning of the test strips, use a total chlorine
solution with a concentration of 1mg/L. For this purpose, first prepare a
stock solution of 100mg/L by adding 0.1g calcium hypochlorite to 1000mL
distilled water while continuously stirring.
Then, filter the solution and subject it to photometric analysis (i.e. with
NANOCOLOR ® Chlorine / Ozone 2, REF 985017) to determine the exact content.
Dilute 1mL from the stock solution (100 mg/L) in 100mL distilled water, then
add 1 spatula tip of ammonium chloride (= 1 mg/L Cl2). Immediately perform
the measurement with the test strip. If the control solution produces a
negative result even after repeating the process, then the remaining unused
test strips must be discarded. Even during a negative control (inserting a
test strip into distilled water), no positive coloration may occur. Possible
reasons for incorrect functioning of the test strips may be that the use-by-
date has been exceeded, the container has been left open for too long or has
been stored incorrectly.
Interferences:
The presence of other strong oxidants such as bromine, iodine and hydrogen
peroxide will also lead to false positive results.
Disposal:
Used test strips can be placed in the normal household waste.
Storage:
Avoid exposing the strips to sunlight and moisture. Keep container cool and
dry (storage temperature 4–30 °C).
If correctly stored, the test strips may be used until the use-by-date printed
on the packaging.
Additional information:
The test strip container stopper contains a non-toxic drying agent. If
swallowed, drink plenty of water.
U.S. Patent No. 9,052,303
MACHEREY-NAGEL GmbH & Co. KG ·
Valencienner Str. 11 · 52355 Düren · Germany
Tel.: +49 24 21 969-0 · info@mn-net.com · www.mn-
net.com
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>