T/CNTAC RM2-2022 Silica extraction column for determination of banned azo dyes in textiles
T/CNTAC RM2-2022 Silica extraction column for determination of banned azo dyes in textiles
Basic Information
Scope
Scope: This standard sample is applicable to GB/T 17592 "Determination of Prohibited Azo Dyes in Textiles", and it plays an extraction role during the test process. This standard sample can be used for quality control to ensure the consistency of test conditions and the comparability of test results. Main technical content: This standard sample is composed of a polypropylene column filled with porous diatomite. The column has a diameter of (27±2) mm, a height of (153±5) mm, and a filling height of (90±3) mm. The upper and lower ends of the column are equipped with high-density sieve plates. The upper sieve plate is brownish yellow in color and turns black when exposed to sodium metabisulfite solution, while the lower sieve plate is white and does not show any color reaction. This standard sample should be used with a flow controller with a diameter of approximately 1 mm.