DPD Total Chlorine Determination Kit 0.05-1mg/l

Specification Introduction:
Specification: 0.05-1mg/l
Testing frequency: 50 times/box
Shelf life: 2 years
Storage conditions: Room temperature, cool and dry place

Operating instructions:
Take a clean colorimetric tube and add the water sample to the scale line (15mL) of the tube. Pour the total chlorine determination reagent into the colorimetric tube, shake it until completely dissolved, and then lift the tube to a position about 2 centimeters above the colorimetric card and visually compare it with the standard color scale from top to bottom. The color scale that matches the color tone of the solution in the tube is the total chlorine content in water (mg/L).
Note: 1) The pH value of the water sample to be tested is 5.0~8.0, and the temperature is 15~25 ℃;
2) The presence of other oxidants can interfere with the measurement;
3) The colorimetric process should be completed within 5 minutes after adding the medication.

Common interference:
1. The pH value should be controlled between 5-8.
2. Oxidants: bromine, iodine, aniline, iodoanine, ozone, hydrogen peroxide, chromate, manganese oxide, etc.
3. Reductive agents: Nitrite, etc.
4. If the alkalinity of water exceeds 250mg/l and the acidity exceeds 150mg/l, the measured values will be unstable during the measurement process, and the sample color will disappear or become very light. Adding diluted HCl or NaOH to the sample for neutralization reaction can solve this problem.
5. The color carried by the liquid itself can also cause interference. Activated carbon can be used for decolorization.

matters needing attention:
This product is non-toxic, but please keep it out of reach of children.
Accidentally touching the skin, rinse off with water.