水质 游离氯和总氯的测定 N，N-二乙基-1，4-苯二胺分光光度法
Water quality--Determination of free chlorine and total chlorine--Spectrophotometric method using N，N-diethyl-1，4-phenylenediamine
1989-11-03
HJ 586-2010
水质 游离氯和总氯的测定 N,N-二乙基-1,4-苯二胺分光光度法
Water quality.Determination of free chlorine and total chlorine.Spectrophotonetric method using N,N-diethyl-1,4-phenylenediamine