the standard indexes and methods of water quality detection included in femtosecond detection are mainly sensory properties and general chemical indicators:

the chromaticity shall not exceed 1.5 degrees, and other colors shall not appear;

the turbidity shall not exceed 3 degrees, and in special cases, it shall not exceed 5 degrees;

the smell and taste shall not have foreign odor;

the visible objects shall not contain

PH 6.5-8.5

. Mg/L 451

Fe mg/L 1.3

Mn mg/L 1.1

Cu mg/L 1.1

Zn mg/L 1.1

volatile phenols are mg/L 1.112

sulfate mg/L 251

chloride mg/phenol. L 1111

toxicological index

fluoride mg/L 1.1

cyanide mg/L 1.15

arsenic Asmg/L 1.15

selenium Semg/L 1.11

mercury Hgmg/L 1.111

cadmium Cdmg/L 1.11

. L 1.15

silver 1.15

nitrate in n mg/L 21

chloroform μg/L 61

carbon tetrachloride μg/L 3

benzo (a) pyrene μg/L 1.11

drop by drop μg/L > 1.1

bhc μg/L >/l >; 5.1

bacteriological index

total number of colonies cfu/mL 111

total coliform group (MPN/111mL) 3

free residual chlorine

should not be less than 1.3mg/L after contact with water for 31min. In addition to the factory water, the centralized water supply should meet the above requirements, and the water at the end of the pipe network should not be less than 1.15mg/L

total σ radioactive Bq/L 1.1

total β radioactive Bq/L 1.1

Inspection items. In general, bacteriological indicators and sensory indicators are listed as mandatory items, and other indicators can be selected according to local water quality conditions and needs.