UNE-EN ISO 7393-2:2000 水质 游离氯和总氯的测定 第2部分:使用 N,N-二乙基-1,4-苯二胺进行常规控制的比色法(ISO 7393-2:1985)
WATER QUALITY. DETERMINATION OF FREE CHLORINE AND TOTAL CHLORINE. PART 2: COLORIMETRIC METHOD USING N, N-DIETHYL-1,4-PHENYLENEDIAMINE, FOR ROUTINE CONTROL PURPOSES (ISO 7393-2:1985)