This standard specifies the method for the determination of the content of polychloriznated benzenes (see Annex A) in dye products.
This standard is applicable to the determination of the content of polychloriznated benzenes in commercial dyes, dye products, dye intermediates and textile dyeing auxiliaries by gas chromatography-mass spectrometry (GC-MS) or gas chromatography-electron capture detector (GC-ECD).
2 Normative references
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
GB/T 6682-2008 Water for analytical laboratory use - Specification and test methods (ISO 3696:1987, MOD)
GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgment of limiting values
3 Theory
Extract the polychloriznated benzenes in specimens with n-hexane in ultrasonic bath, then conduct determination of the extract by gas chromatography-mass spectrometry (GC-MS) or gas chromatography-electron capture detector (GC-ECD), and quantify it by external standard method.
