DIN 38409-23-1980 德国对水.废水和淤泥的统一检验法.总的作用参数和物质参数(H组).亚甲蓝活性物质和铋活性物质的测定(H23)
German standard methods for the examination of water, waste water and sludge; general measures of effects and substances (group H), determination of methylen blue active and bismut active substances (H23)
German standards methods for the examination of water, waste water and sludge; general measures of effects and substances (group H); determination of methylen blue active and bismut active substances (H 23)Diese Norm wurde gemeinsam mit der Fachgruppe Wa