Samples of sanitary

For laboratory research with the aim of sanitary-hygienic estimation of selected small amount of air, water, soil, food products and other Methods of selection and marking of sanitary samples given in the relevant GOST.
Selected samples of sanitary samples shall: 1) possible to reflect qualitative indicators and uniformity of the investigated object; 2) be selected in a clean, dry containers for chemical and Toxicological analysis, and for bacteriological research in sterile glassware and sterile instrument; 3) sealed and provided with labels indicating the names of the marks, number, date and time of sampling; 4) to promptly delivered to the laboratory. When selecting sanitary samples necessarily the act, stating the place, and by whom and when samples have been taken, the amount and method of sampling, their inventory, the purpose and character of laboratory research.
Selection sanitary air samples produce aspiration or secondary sedimentation method (the last is not possible to determine the concentration of contaminants). When sampling the suction method important is the amount of air passing through a given absorber. Thus, the definitions of maximum one-time concentration of dust in the air is passed not less than 2 m3 of air; for average daily concentration not less than 6 m3. For determination of radioactive and carcinogenic substances prosushivayut through special installation, not less than 1000 m3 of air. Sampling of air in industrial and residential premises is done usually at the level of 1.5 m in places suspected of the highest concentration of the analyte. Sanitary air samples for bacteriological studies are selected with the help of the device Krotov Yu.
Sanitary water samples for physico-chemical, bacteriological, helminthological and hydrobiological studies taken separately and in such a way that sample collection was part of the whole mass of the investigated water. From open water samples taken at the site of the proposed diversion of water both at the surface and depth, intended for lifting, and the existing water intake directly after the pumps. Average sanitary samples of wastewater at treatment plants are taken at least once per hour, per day or per shift. Selection of single sample do when waste water is the maximum concentration of pollutants. Sanitary water samples for bacteriological tests selected in sterile ware and sanitary samples of plankton - with the help of plankton nets. Sanitary water samples to determine the degree of pollution by helminth eggs are taken in the amount of 10-15 l (for 30-60 min 0.5-1.0 l after 5 minutes) above and below the place of pollution, the coast and in the middle of a river or lake, as well as with the surface from a depth of 20-40 cm and 50 cm from the bottom. From every point take 3-5 water samples in the morning, afternoon and evening.
Sanitary soil samples taken in net banks with ground traffic in the amount of 1-2 liters
Sanitary samples of food products for the chemical, bacteriological and Toxicological studies are taken in cases when there are doubts in their quality in the organoleptic evaluation, as well as in cases of food poisoning in the examination of technological processes in production, etc., After reading the documentation (sanitary passport) large quantities of products is divided into several parts; P.F. taken from different places each part, then they are mixed thoroughly and make the average sample characterizing the entire party to this product. P.F. bulk products (flour, cereals, sugar) take sack probe. Liquid products (milk, vegetable oil and others) before the samples are thoroughly mixed. P.F. meat cut of the hip or the muscular layers of the neck of the animal. P.F. fish taken from the middle of the barrel or box. P.F. lunch or separate dishes in the dining room charge directly from the table of the consumer. P.F. products for radioactivity taken under control dosimeters type "Crystal", "Light" and others See. also Sanitary-hygienic research.