檢 驗(yàn) 項(xiàng) 目
T e s t I t e m |
檢 驗(yàn) 標(biāo) 準(zhǔn)
T e s t S t a n d a r d |
性狀
(Characters) |
白色粉末
(White powder) |
含量
(Assay) |
97.0% |
澄清度實(shí)驗(yàn)
(Appearance of solution) |
應(yīng)符合規(guī)定
(Comply with the standard) |
水不溶物
(Water-insoluble) |
0.005% |
酸性亞硫酸鹽(以Na2HSO3計(jì))
(Acid accumulator sulfite(Na2HSO3)) |
應(yīng)符合規(guī)定
(Comply with the standard) |
游離堿(以Na2CO3計(jì))
(Free alkali(Na2CO3)) |
0.1% |
氯化物
(Chloride) |
0.005% |
硫代硫酸鹽(S2O3)
(Thiosulfate(S2O3)) |
0.01% |
鐵
(Iron) |
0.0005% |
重金屬
(Heavy metal) |
0.001% |
砷
(Arsenic) |
0.0001% |