GB/T 11736-1989
Standard method for hygienic examination of chlorine in air of residential areas — Methyl orange spectrophotometric method
HJ T 30-1999
HJ/T 30-1999
Stationary source emission—Determination of chlorine—Methyl orange spectrophotometric method
GB/T 16029-1995
Workplace air—Determination of chlorine—Methyl orange spectrophotometric method
GB/T 6730.34-2017(\u82f1\u6587\u7248)
铁矿石 锡含量的测定 邻苯二酚紫-溴化十六烷基三甲胺分光光度法
GB/T 6730.38-2017(\u82f1\u6587\u7248)
铁矿石 钴含量的测定 亚硝基-R盐分光光度法
GB/T 6730.30-2017(\u82f1\u6587\u7248)
铁矿石 铬含量的测定 二苯基碳酰二肼分光光度法
GB/T 6730.7-2016(\u82f1\u6587\u7248)
铁矿石 金属铁含量的测定 磺基水杨酸分光光度法
KS M 8225-2006(2023)
Methyl orange
KS M 8225-2006(2018)
DB37/T 269-1999
GB/T 223.29-2008
Iron, steel and alloy - Determination of lead content - Carrier precipitation-xylenol orange spectrophotometric method
GB/T 223.67-2008
Iron, steel and alloy - Determination of sulfur content -Methylene blue spectrophotometric method
GB/T 11848.13-1991
Determination of zirconium in uranium ore concentrate by xylenol orange spectrophotometric method
GB/T 16489-1996
Water quality--Determination ofsulfide--Methylene blue spectrophotometric method
HJ 1226-2021
GB/T 2441.9-2010
Determination of urea - Part 9: Methylenediurea content - Spectrophotometric method
JB/T 9552.5-1999
HJ 824-2017
GB/T 3654.6-2008
Ferroniobium - Determination of sulfur content - Combustion-iodate titrimetric method,methylene blue photometric method and infrared absorption method