Heavy metals generally refer to metals (such as lead (PB), cadmium (CD), chromium (CR), mercury (Hg), copper (Cu), gold (AU), silver (Ag)) with a density greater than 4.5g/cm3. Some heavy metals enter the human body through food or food contact materials, interfere with the normal physiological function of human beings and endanger human health, which are called toxic heavy metals. These metal elements mainly include: lead (PB), cadmium (CD), chromium (CR), mercury (Hg), etc.
Relevant standards for heavy metal detection:
GB / T 12496.22-1999 test methods for wood based activated carbon determination of heavy metals
GB / T 5009.74-2003 limit test of heavy metals in food additives
Textiles -- Determination of heavy metal ions -- Atomic Absorption Spectrophotometry (GB / T 17593-1998)
GB / T 20380.1-2006 starch and its products heavy metal content Part 1: Determination of arsenic content by atomic absorption spectrometry
GB 20424-2006 limit specification for harmful elements in heavy metal concentrate products
GB / T 17593.4-2006 textiles determination of heavy metals Part 4: atomic fluorescence spectrometry for arsenic and mercury
GB / T 17593.3-2006 textiles determination of heavy metals Part 3: hexavalent chromium spectrophotometric method
GB / T 20380.2-2006 starch and its products heavy metal content Part 2: Determination of mercury content by atomic absorption spectrometry
GB / T 20380.4-2006 starch and its products heavy metal content Part 4: Determination of cadmium content by electrothermal atomic absorption spectrometry
GB / T 17593.1-2006 textiles determination of heavy metals Part 1: Atomic Absorption Spectrophotometry
GB / T 20380.3-2006 starch and its products heavy metal content Part 3: Determination of lead content by electrothermal atomic absorption spectrometry
GB 20814-2006 limits and determination of 10 heavy metal elements in dyestuff products
GB / T 20432.5-2007 test methods for photographic grade chemicals Part 5: Determination of heavy metals and iron content
GB / T 17593.2-2007 textiles determination of heavy metals Part 2: inductively coupled plasma atomic emission spectrometry
GB / T 7532-2008 determination of heavy metals in organic chemical products visual colorimetry
GB / T 9735-2008 chemical reagent General method for determination of heavy metals
GB / T 6276.9-1986 ammonium bicarbonate for industrial use - Determination of heavy metal content - Visual turbidimetric method
GB / T 22930-2008 leather and fur chemical tests determination of heavy metal content
GB / T 23950-2009 general method for determination of heavy metals in inorganic chemical products
GB / T 7532-1987 general method for determination of heavy metals in organic chemical products Visual limit method
GB / T 6276.9-2010 determination of ammonium bicarbonate for industrial use Part 9: heavy metal content visual turbidimetric method
GB / T 9735-1988 chemical reagent General method for determination of heavy metals
GB / T 10304.11-1988 determination of heavy metals (PB) in cathode carbonate
GB / T 12684.8-1990 determination of heavy metals in industrial boric acid
GB / T 13216.12-1991 test method for glycerine limit test of heavy metals
