Chemicals	Detection method	Equipment name and model number	Producers	Lowest detectable limit (mg/L)
Iron (Fe)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.05
Manganese (Mn)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.05
Volatile phenol, (VP)	Drinking water standard testing method GB/T5750-2006	Flow injection analyzer, Futura 3	France	0.002
Cyanide (CN⁻)	Drinking water standard testing method GB/T5750-2006	Flow injection analyzer, Futura 3	France	0.002
Fluoride (F⁻)	Drinking water standard testing method GB/T5750-2006	Ion chromatograph, ICS3000	USA	0.1
Lead(Pb)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.005
Mercury (Hg)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.0001
Ammonia nitrogen ( ${NH}_{3}^{-} N$ )	Drinking water standard testing method GB/T5750-2006	Ultraviolet and visible spectrophotometer 1750	Japan	0.02
Nitrate ( ${NO}_{3}^{-}$ )	Drinking water standard testing method GB/T5750-2006	Ion chromatograph, ICS3000	USA	0.02
Copper (Cu)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.005
Zinc (Zn)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.05
Selenium (Se)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.005
Arsenic (As)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.005
Chromium (Cr⁶⁺)	Drinking water standard testing method GB/T5750-2006	Ultraviolet and visible spectrophotometer 1750	Japan	0.004
Cadmium (Cd)	Drinking water standard testing method GB/T5750-2006	Inductively coupled plasma mass spectrometer, 7500 ce	USA	0.001