二羟基联吡啶检测标准

Pure adipic acid--Determination of content of iron--2,2'-Bipyridyl spectrophotometric method

Maleic anhydride for industrial use－Methods of test－Determination of iron content－2,2′-bipyridyl photometric method

Phthalic anhydride for industrial use－Methods of test－Determination of iron content－2,2′-bipyridyl photometric method

Phthalic anhydride for industrial use — Methods of test — Part 11: Determination of iron content — 2,2'- Bipyridyl photometric method

Boric acid, boric oxide, disodium tetraborates, sodium perborates and crude borates for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method