Collect water samples 1.0 m below the water surface at each sampling point, set 3 parallel samples for each detection index, and take the average of the 3 measurement results as the original data
At each sampling point, water samples at 1.0 m below the surface of the water were collected, and three parallel samples were set up for each test indicator, and the results of the three measurements were averaged as raw data.
The water samples 1.0 m below the water surface were collected at each sampling point. Three parallel samples were set for each detection index, and the average value of the three measurement results was taken as the original data<br>