GB/T 21126-2007
Determination of sodium formaldehyde sulfoxylate in grain products
20233875-T-449
Determination of sodium formaldehyde sulfoxylate in grain products
KS D 1673-5-2023
Iron and steel — ICP atomic emission spectrometric method — Part 5: Determination of niobium content — Dissolution in phosphoric and sulfuric acids or Dissolution in acids and fusion with potassium disulfate