标准摘要
[中文适用范围]： 该方法适用于质量浓度范围为 0.04 mg/l 至 1.5 mg/l 的硫化物测定。 以下离子在指定的质量浓度下不会产生干扰：氰化物、碘化物、硫代硫酸盐、硫氰酸盐、亚硫酸盐。 其原理是过滤、保留滤液中的硫化物、剥离硫化物、形成白亚甲基蓝、测量该复合物在665 nm波长处的吸光度。 附录 A 描述了硫化物储备溶液的标准化。 [外文原描述]： The specified method is applicable to sulfide determination in a mass concentration range from 0,04 mg/l to 1,5 mg/l. The following ions do not interfere in specified mass concentrations: cyanide, iodide, thiosulfate, thiocyanate, sulfite. The principle is filtration, conservation of the sulfide in the filtrate, stripping of the sulfides, formation of leukomethylene blue, measurement of the absorbance of this complex at a wavelength of 665 nm. Annex A describes standardization of sulfide stock solution.
英文名称Water quality — Determination of dissolved sulfide — Photometric method using methylene blue