质量指标

Specification

GB1903.49-2020

柠檬酸锌（C₁₂H₁₀O₁₄Zn₃·3H₂O）含量,w/%

Content（C₁₂H₁₀O₁₄Zn₃·3H₂O）

Anhydrous、Dihydrate

---

Trihydrate

99.0-103.0

锌(Zn)含量(以干基计),w/% ≥

Content(Zn)

Anhydrous、Dihydrate

31.3

Trihydrate

---

溶解度(25 ℃)/(g/100 mL)  ≥  

solubility

Anhydrous、Dihydrate

---

Trihydrate

3.60

盐酸不溶物,w/%         ≤

Hydrochloric acid insoluble

Anhydrous、Dihydrate

Trihydrate

0.1

氯化物(以Cl计) ,w/%      ≤

Chloride

0.05

干燥减量,w/% ≤

Loss on drying

1.0

溶液澄清度

Completeness of solution

Anhydrous、Dihydrate

---

Trihydrate

合格

硫酸盐 （以SO4计）   ,w/% ≤ 

Sulfate

0.05

铅（Pb）/mg/kg        ≤ 

Lead   

5.0

总砷（As）/mg/kg≤

Arsenic

2.0

镉（Cd）/mg/kg

Cadmium

5.0

铁（Fe） /mg/kg   ≤

Ferric   

50