甲酸铵
含量【 (hcoonh4】, w/% ≥ content( (hcoonh4), w/% ≥ 98 98 99
ph值 ph value 6.0-8.0 —— 6.3-6.8
灼烧残渣(以硫酸盐计),w/% ≤ ignition residue (as sulfates),w/% ≤ 0.02 0.02 0.02
氯化物(cl),w/% ≤ chlorides (cl),w/% ≤ 0.001 0.002 0.002
硫酸盐 ,w/% ≤ sulfate,w/% ≤ 0.005 0.05 0.005
铅(pb), w/% ≤ heavy ls (pb), w/% ≤ 0.0002 —— 0.0002
铁 (fe),w/% ≤ iron(fe),w/% ≤ 0.0005 0.002 0.0005