This standard specifies 20 standard colors with different hues, and the general rules for using these standard colors to determine easily carbonizable substances. This standard applies to the determination of easily carbonized substances in organic chemical reagents.
GB 9737-1988 history
2008GB/T 9737-2008 Chemical reagent.General rules for the determination of readily carbonizable substances
1988GB 9737-1988 General rules for the determination of easily carbonized substances in chemical reagents
GB 9737-1988 General rules for the determination of easily carbonized substances in chemical reagents was changed to GB/T 9737-2008 Chemical reagent.General rules for the determination of readily carbonizable substances .