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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 21896-2019 |
2-Naphthylamine-1，5-disulfonic acid （sulphonic Tobias acid ） 2-萘胺-1，5-二磺酸（磺化吐氏酸） |
China National Standards 1，5 |
 English PDF |
| GB/T 21896-2008 |
2-Naphthylamine-1，5-disulfonic acid （Sulphonic Tobias acid ） 2-萘胺-1，5-二磺酸（磺化吐氏酸） |
China National Standards 1，5 |
English PDF |
| GB/T 15555.5-1995 |
Solid waste--Determination of total chromium--1，5-Diphenylcarbohydrazide spectrophotometric method 固体废物 总铬的测定 二苯碳酰二肼分光光度法 |
China National Standards 1，5 |
English PDF |
| GB/T 15555.4-1995 |
Solid waste--Determination of chromium(VI)--1，5-Diphenylcarbohydrazide spectrophotometric method 固体废物 六价铬的测定 二苯碳酰二肼分光光度法 |
China National Standards 1，5 |
English PDF |
| GB/T 7467-1987 |
Water quality--Determination of chromium(Ⅵ)--1，5 Diphenylcarbohydrazide spectrophotometric method 水质 六价铬的测定 二苯碳酰二肼分光光度法 |
China National Standards 1，5 |
English PDF |
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