指標(biāo)名稱

規(guī)格

優(yōu)級(jí)純GR

分析純AR

化學(xué)純CP

含量

≥99.6%

≥99.5%

≥98.5%

水不溶物

0.002%

≤0.005%

≤0.01%

灼燒殘?jiān)?/p>

≤0.005%

≤0.02%

0.05%

硫酸鹽

≤0.002%

≤0.005%

≤0.005%

磷酸鹽

≤0.0002%

≤0.0005%

≤0.001%

鈉

≤0.005%

≤0.005%

--

鎂

≤0.0005%

≤0.001%

≤0.002%

鉀

≤ 0.005%

≤ 0.005%

-- 

鈣

≤ 0.0005%

≤0.001%

≤0.002%

鐵

≤0.0002%

≤0.0005%

≤0.001%

鎳

≤0.0001%

-

-

銅

≤0.0002%

-

-

鋅

≤0.0002%

-

-

鉛

≤0.0001%

-

-