This standard specifies the methods for determining 19 kinds of aniline derivatives (see Annex A) in dye products.
This standard is applicable to determination of 19 kinds of aniline derivatives in various dosage forms of dye products.
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 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values
3 Theory
Taking dichloromethane as the extracting agent, extract the specimen with ultrasonic wave, then analyze the extract liquor qualitatively with gas chromatography-mass spectrometer, and quantify it with internal standard method.
4 Determination method
4.1 General requirements
Unless otherwise specified, only recognized analytically pure reagents shall be adopted. The inspection result shall be judged according to the rounding-off value comparison method specified in 4.3.3 of GB/T 8170-2008.
4.2 Reagents and materials
GB/T 36907-2018 The following standards are cited: