This national standard specifies the general method "converting the heavy metal in acetic acid medium (PH 3 ~ 4) to sulphuret and determinating with visual colorimetry".
This standard is applicable to the determination of heavy metal (Pb) in chemical reagent. The determination range of Saturated hydrogen sulfide solution colorimetry is 0.3 ~ 2μg/mL (Pb). The determination range of sodium sulfide - glycerin colorimetry is 0.4 ~ 3μg/mL (Pb)
This national standard specifies the general method "converting the heavy metal in acetic acid medium (PH 3 ~ 4) to sulphuret and determinating with visual colorimetry".
This standard is applicable to the determination of heavy metal (Pb) in chemical reagent. The determination range of Saturated hydrogen sulfide solution colorimetry is 0.3 ~ 2μg/mL (Pb). The determination range of sodium sulfide - glycerin colorimetry is 0.4 ~ 3μg/mL (Pb)
