The physical and chemical indicators of this standard are not equivalent to the British Pharmacopoeia (2003 edition) and the United States Pharmacopoeia (27 edition), in which the citric acid content, oxalate, sulphuric acid ash, heavy metal indicators are stricter than the British Pharmacopoeia (2003 edition) The arsenic salt index is stricter than the United States Pharmacopoeia (27th edition). This standard test method refers to the test methods used in the British Pharmacopoeia (2003 edition), the United States Pharmacopoeia (27 edition), and the Pharmacopoeia of the People's Republic of China (2000 edition). This standard replaces GB/T 8269-1998 "citric acid".
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