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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 3654.8-2023 |
Ferroniobium Determination of titanium content chromotropic acid photometry and diantipyrine methane photometry {译} 铌铁 钛含量的测定 变色酸光度法和二安替比林甲烷光度法 |
China National Standards chromotropic |
 English PDF |
| GB/T 3654.8-2008 |
Ferroniobium - Determination of tianiun content - chromotropic acid photometric method 铌铁 钛含量的测定 变色酸光度法 |
China National Standards chromotropic |
English PDF |
| GB/T 223.16-1991 |
Methods for chemical analysis of iron，steel and alloy--The chromotropic acid photometric method for the determination of titanium content 钢铁及合金化学分析方法 变色酸光度法测定钛量 |
China National Standards chromotropic |
English PDF |
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