This standard specifies the method for determining the content of 9 heavy metals in textile dyeing and finishing auxiliaries, including arsenic (As), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), antimony (Sb) and mercury (Hg).
This standard is applicable to the determination of the 9 heavy metal contents in various textile dyeing and finishing auxiliaries.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 6682 Water for analytical laboratory use - Specification and test methods
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Determination of 8 heavy metal contents through inductively coupled plasma atomic emission spectrometry
3.1 Theory
After the sample is digested by acid, the emission intensity of 8 heavy metal elements, i.e., lead, cadmium, arsenic, copper, cobalt, nickel, chromium and antimony, in the digestion solution shall be determined by using an inductively coupled plasma atomic emission spectrometer at the corresponding analysis wavelength, the concentration of each heavy metal element shall be determined according to the standard working curve, and the total amount of digested heavy metals in the sample shall be calculated.
3.2 Reagents and materials
GB/T 34673-2017 The following standards are cited: