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material and completely filled.

2. Determination of active chlorine

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– laboratory glassware in accordance with GOST 1770-74 and GOST 20292-74 with a volume of: 100 and 1000 cm 3 volumetric flasks; pipettes without division of 5, 10, 25 cm 3; microburette 5 cm 3; according to GOST 25336-82; conical flasks with ground stoppers with a capacity of 250 cm 3;

– distilled water according to GOST 6709-72;

– potassium iodide crystals (KI) according to GOST 4232-74,

– sulfuric acid according to GOST 4204-77;

– potassium dichromate according to GOST 4220-75;

– soluble starch according to GOST 10163-76;

All qualifications for analysis (

a) cooking

b) preparation of 0 1 mol / dm 3 solution of potassium dichromate:

c) preparation of 1 mol / dm 3 of sulfuric acid solution: 28 cm 3 of concentrated sulfuric acid carefully, add 750 cm 3;

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d) cooking

e) preparation of a 10% solution of potassium iodide: 10 g of potassium iodide are brought to 100 cm;

e) solution: 10 cm 3 of 10% potassium iodide solution are placed in a 250 cm 3 conical flask, 20 cm 3 1 mol / dm 3 of sulfuric acid solution and 10 cm 3 are added

where is the volume of sodium thiosulfate consumed for titration, cm 3.

Cax = (V * K *

V – volume

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2

– indicator paper Millichlor;

– laboratory glassware in accordance with GOST 1770-74 and GOST 20292-74 with 15 cm 3.

– potassium iodide crystals (KI) according to GOST 4232-74,

3. Determination of pH

– universal indicator paper;

The INSTRUCTION was developed by the Vitebsk State Medical University for Hygiene, the National Hygiene Regional Center for Hygiene, the Epidemiology and Public Health, the AKVAPRIBOR, Gomel.

The authors:

There are hygiene and epidemiology centers, health care facilities.

1. General information

2. Preparation of a neutral anolyte disinfectant solution.

3. Methods of quality control of anolyte neutral.

– indicator strips DEZIKONT-NA-01-P-150 NPF "Vinar";

If you’re not in the middle of the day, you’ll be able to make it clear.

– laboratory glassware in accordance with GOST 1770-74 and GOST 20292-74 with 15 cm 3.

– potassium iodide crystals (Kl) according to GOST 4232-74,

4. Chlorination of the pool with anolyte neutral.

The amount of

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