Water sampling

Name of the index

Material of the sample container

Method of storage and conservation

Volume

Maximum recommended storage period

Recommended location of measurement

Note

Hydrogen index

Polymer material or glass

-

a minimum of 2.0 dm3 (2 liters)

-

At the sampling site

Measurement should be done as soon as possible after sampling

Transporting at temperatures below the sampling temperature

6 hours

Laboratory

Total mineralization, dry residue

Polymer material or glass

Cooling to 2°C - 5°C

24 hours

Laboratory

-

Total hardness

Polymer material or glass

-

24 hours

Laboratory

Storage is allowed for 48 hours, except for samples with a specific electrical conductivity of more than 70 mcSm/m.It is not allowed to use sulfuric acid.

Permanganate oxidability

Glass

Acidification to a pH of less than 2 with sulfuric acid, cooling to 2°C - 5°C and storage in a dark place

2 days

Laboratory

Measurement should be done as soon as possible

Polymeric material

Freezing to minus 20°C

1 month

Laboratory

Acidity and alkalinity

Polymer material or glass

Cooling to 2°C - 5°C

24 hours

Laboratory

It is preferable to perform measurements at the sampling site (especially for samples with a high concentration of dissolved gases)

Specific conductivity

Polymer material or glass

Cooling to 2°C - 5°C

24 hours

Laboratory

Measurement should be done as soon as possible.It is preferable to perform measurement at the sampling site

Suspended solids content

Polymer material or glass

-

24 hours

Laboratory

Measurement should be done as soon as possible

Ammonia and ammonium ions (total)

Polymer material or glass

Acidification with sulfuric acid to pH less than 2, cooling to 2°C - 5°C

24 hours

Laboratory

-

Cooling to 2°C - 5°C

6 hours

Laboratory

Nitrogen of organic compounds

Polymer material or borosilicate glass

Acidification with sulfuric acid to a pH less than 2, cooling to 2°C - 5°C and storage in a dark place

24 hours

Laboratory

Acidification is not performed if the same sample is used to determine ammonia

Bromides and inorganic bromine compounds

Polymer material or glass

Cooling to 2°C - 5°C

24 hours

Laboratory

Samples should be protected from direct sunlight

Hydrocarbonates

Polymer material or glass

Cooling to 2°C - 5°C

24 hours

Laboratory

-

Nitrates

Polymer material or glass

Filtration through a membrane filter with a pore size of 0.45 microns and cooling to 2°C - 5°C

48 hours

Laboratory

-

Nitrites

Polymer material or glass

Cooling to 2°C - 5°C

24 hours

Laboratory

-

Silicates (dissolved), silicates (total)

Polymeric material

Filtration and acidification with sulfuric acid to pH less than 2 and cooling to 2°C - 5°C

24 hours

Laboratory

-

Sulphates

Polymer material or glass

Cooling to 2°C - 5°C

7 days

Laboratory

-

Organic carbon

Polymer material or glass

Cooling to 2°C - 5°C and storage in a dark place

7 days

Laboratory

-

Fluorides

Polymeric material

-

1 month

Laboratory

-

Chlorides

Polymer material or glass

-

1 month

Laboratory

-

Chromaticity

Polymer material or glass

-

6 hours

Laboratory

-

Cooling to 2°C - 5°C and storage in a dark place

24 hours

Laboratory

Turbidity

Polymer material or glass

-

24 hours

Laboratory

-

Odor

Polymer material or glass

Cooling to 2°C - 5°C

6 hours

Laboratory

It is allowed to measure at the sampling site

Specific conductivity

Polymer material or glass

Cooling to 2°C - 5°C

24 hours

Laboratory

Measurement should be done as soon as possible.It is preferable to perform measurement at the sampling site

Suspended solids content

Polymer material or glass

-

24 hours

Laboratory

Measurement should be done as soon as possible.

Ammonia and ammonium ions (total)

Polymer material or glass

Acidification with sulfuric acid to pH less than 2, cooling to 2°C - 5°C

24 hours

Laboratory

-

Cooling to 2°C - 5°C

6 hours

Laboratory

Nitrogen of organic compounds

Acidification with sulfuric acid to pH less than 2, cooling to 2°C - 5°C

Cooling to 2°C - 5°C

24 hours

Laboratory

-

Oxygen

Polymer material or glass

-

-

At the sampling site

-

Polymeric material

Oxygen fixation is performed in accordance with the requirements of specific methods for determining the index

4 days

Laboratory

Oxygen fixation is performed in accordance with the requirements of specific methods for determining the index

Taste

Polymer material or glass

-

6 hours

Laboratory

The determination is carried out in the absence of suspicion of bacterial contamination and the absence of substances in dangerous concentrations

Metals

Polymeric material

Acidification to pH less than 2

0.25 dm3 (0.25 l.)

1 month

Laboratory

-

Metals (dissolved forms)

Polymeric material

Filtration and acidification of filtrate with nitric acid to pH less than 2

1 month

-

BOD (biochemical oxygen demand)

Glass

-

1,0 дм³ (1 л.)

24 ч

Laboratory

-

COD(chemical oxygen demand)

Glass

Cooling to 2°C - 5°C and storage in a dark place

5 days

-

Mercury

Glass

Acidification to pH less than 2

0.1 dm3 (0.1 l.)

1 month

Laboratory

-

Fats, oils, and hydrocarbons

Glass

Add the substance used for extraction (if possible) at the sampling site and cooling to 2°C-5°C

1.0 dm3 (1 l.)

24 hours

Laboratory

-

Benz(a)pyrene

Glass

Adding the solvent used for extraction; storage at a temperature of 2°C-5°C. If active chlorine is present, add 20 mg of sodium thiosulfate per 1 liter of sample

1.0 dm3 (1 l.)

1 days

Laboratory

Sample extraction is carried out no later than 1 day from the moment of sampling

Oil and petroleum products (total)

Glass

Add the substance used for extraction (if possible on site) and cool to 2°C-5°C

1.0 dm3 (1 l.)

24 hours

Laboratory

-

Organic chlorine compounds (organochlorine compounds)

Glass

Cooling to 2°C - 5°C and storage in a dark place

1.0 dm3 (1 l.)

3 days

Laboratory

Measurement should be done as soon as possible

Pesticides (organic compounds containing chlorine)

Glass

Adding a substance used for extraction by a specific method of determination; cooling to 2°C - 5°C and storing in a dark place

1.0 dm3 (1 l.) (1 л.)

5 days

Laboratory

-

Pesticides (organic compounds containing phosphorus)

Glass

Cooling to 2°C - 5°C and storage in a dark place

1.0 dm3 (1 l.) (1 л.)

24 hours

Laboratory

-

Surfactants (cationic)

Glass

Cooling to 2°C - 5°C

0.1 dm3 (0.1 l.)

48 hours

Laboratory

-

Surfactants (anionic)

Glass

Cooling to 2°C - 5°C

48 hours

-

Adding 2-4 cm3 ³ chloroform per 1 dm3 ³ sample and cooling to 2°C - 5°C

7 days

Surfactants (non-ionic)

Glass

Cooling to 2°C - 5°C

1 month

-

Sulfides (including volatile ones)

Polymer material or glass

Adding sodium carbonate followed by adding zinc acetic acid in quantities depending on the method of determination

0.5 dm3 (0.5 l.)

24 hours

Laboratory

Containers with samples are filled to the top.Measurement should be done as soon as possible

Phenols

Glass

Cooling to 2°C - 5°C and storage in a dark place.

1.0 dm3 (1 l.) (1 л.)

24 hours

Laboratory

-

Chlorophyll

Polymer material or glass

Cooling to 4°C

1.0 dm3/Filters

24 hours

Laboratory

When transporting the container is placed in a dark place

Filtration and freezing of precipitate

1 month

When transporting the container is placed in a dark place

Chloroform and other volatile halogenorganics

Glass

Storage at 2°C - 5°C

1.0 dm3 (1 l.) (1 л.)

48 hours

Laboratory

-

Alpha activity, beta activity

Polymeric material

-

A 5.0 dm3 (5 l.)

Quickly as possible

Laboratory

-

Isotopes of radon.Radium by radon

Polymeric material

Cooling to 2°C - 5°C

As quickly as possible, but no more than 48 hours, due to the short half-life

-

Radium

Polymeric material

-

Quickly as possible

-

Radioactive strontium

Polymeric material

-

As quickly as possible within 14 days.

-