GSO ISO 18191:2021由GSO 发布于 2021-07-01。
GSO ISO 18191:2021在国际标准分类中归属于: 13.060.50 水的化学物质检验。
GSO ISO 18191:2021 的最新版本是哪一版?
最新版本是 GSO ISO 18191:2021 。
ISO 18191:2015 specifies a spectrophotometric determination of the pHt of sea water on the total hydrogen ion concentration pH scale using the indicator dye m-cresol purple. The total hydrogen ion concentration, [H+]t, is expressed as moles per kilogram of sea water. The method is suitable for assaying oceanic levels of pHt 7,4 to 8,2 for normal sea water of practical salinity ranging from 20 to 40.
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