ICS71.040.40:71.040.30G60GB中华人民共和国国家标准GB/T604-2002代替GB/T604一1988化学试剂酸碱指示剂H变色域测定通用方法Chemical reagent-General method for the determination of pH rangescorresponding the colour transition of acid-base indicators2002-10-15发布2003-04-01实施中华人民共和国国家质量监督检验检疫总局发布
