GB/T 223.37-1989

Methods for chemical analysis of iron, steel and alloy The indophenol blue photometric method for the determination of nitrogen content after distillation separation

NORMA vydaná dňa 31.3.1989

The information about the standard:

Designation standards: GB/T 223.37-1989
Note: NEPLATNÁ
Publication date standards: 31.3.1989
Country: Chinese technical standard
Kategória: Technické normy GB