This standard specifies the allowable contents (limits) and determination methods for 12 heavy-metal elements in the dye products.
This standard is applicable to various commercial dyes.
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 6682-2008 Water for analytical laboratory use - Specification and test methods
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
JJG 694 Verification regulation for atomic absorption spectrophotometers
3 Requirements
The limit of heavy-metal elements in dye products shall meet those specified in Table 1. The limit of heavy-metal elements in liquid dyes and paint distemper shall be calculated based on their solid contents.
