By the addition of the nitric acid

By the addition of the nitric acid concentration in the water sample to maintain sample from being adsorbed ions on the surface of the sample container and prevent precipitate of parameters to be measured. It also inhibits the microorganism also by pH < 2
the water of sub-samples used to be. Clean water deionized ,Tools and equipment used in the sub are clean and be sure there is not Contaminate between each sample.

ผลลัพธ์ (อังกฤษ) 2:

By the addition of the nitric acid concentration in the water sample to maintain sample from being adsorbed ions on the surface of the sample container and prevent precipitate of parameters to be measured. It also inhibits the Microorganism also by pH <2
of the Water Sub-samples to be used. Clean water deionized, Tools and equipment used in the sub are clean and be sure there is not Contaminate between each sample.