Chlorine gas flow meter | Professional English expressions in the photography industry (2) | Rotameter flow meter

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1. Quality Standards for Bottled Water

1 Scope This standard specifies the definition, hygiene requirements, and inspection methods for bottled purified drinking water. This standard is applicable to bottled purified drinking water. The articles included in the following standards are referred to as articles of this standard by reference. At the time of publication, all versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB 4789.2-94 Microbiological examination of food hygiene - Determination of total bacterial count GB 4789.3-94 Microbiological examination of food hygiene - Determination of coliform bacteria GB 4789.4-94 Microbiological examination of food hygiene - Salmonella examination GB 4789.5-94 Microbiological examination of food hygiene - Shigella examination GB 4789.10-94 Microbiological examination of food hygiene - Staphylococcus examination GB 4789.11-94 Microbiological examination of food hygiene - Hemolytic streptococcus examination GB 4789.15-94 Microbiological examination of food hygiene - Mold and yeast examination GB 5749-85 Sanitary standards for drinking water GB 5750-85 Sanitary standards for drinking water GB 7718-94 General standard for food labeling GB/T 8538-1995 Testing methods for natural mineral water GB 14881-94 GB 17323-1998 General Hygiene Standards for Food Enterprises - Bottled Drinking Purified Water - Definition 3. This standard adopts the following definitions. Bottled purified water for drinking is made from water that meets the hygiene standards for drinking water. It is produced by electrodialysis, ion exchange, reverse osmosis, distillation, and o

chlorine gas flow meter|rotameter flow meter

ther appropriate processing methods, sealed in a container, and does not contain any additives. It can be consumed directly. 4.1 Raw material water: It should comply with the provisions of GB 5749. 4.2 Sensory indicators: Sensory indicators should comply with the provisions of Table 1. The sensory index items in Table 1 require chromaticity, degree ≤ 5, no other color turbidity, degree ≤ 1 odor and taste, and no visible odor. 4.3 Physical and chemical indicators 4.3.1 PH value, conductivity, potassium permanganate consumption, chloride and other indicators should comply with GB 17323 regulations. 4.3.2 The physical and chemical indicators shall comply with the provisions of Table 2. The physical and chemical indicators in Table 2 include lead (calculated as Pb), mg/L ≤ 0.01 arsenic (calculated as As), mg/L ≤ 0.01 copper (calculated as Cu), mg/L ≤ 1 cyanide (calculated as CN ¯) ¹, mg/L ≤ 0.002 volatile phenol (calculated as phenol) ¹, mg/L ≤ 0.002 free chlorine, mg/L ≤ 0.005 trichloromethane, mg/L ≤ 0.02 carbon tetrachloride, and mg/L ≤ 0.001 nitrite (calculated as NO2 ¯) ≤ 0.002. The microbiological indicators should comply with the provisions of Table 3. Table 3 Microbial indicators: Total number of bacterial colonies, cfu/ml ≤ 20 coliforms, MPN/100mL ≤ 3 pathogenic bacteria (referring to intestinal pathogenic bacteria and pathogenic cocci), no mold or yeast shall be detected, and cfu/mL shall not be detected. 5.1 Sensory indicators: Color, turbidity, odor, and visible substances shall be determined according to the methods specified in GB/T 8538. 5.2 Physical and chemical indicators 5.2.1 PH value, conductivity, potassium permanganate consumption, and chloride shall be determined according to the methods specified in G

Chlorine gas flow meter | Professional English expressions in the photography industry (2) | Rotameter flow meter

1. Quality Standards for Bottled Water

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