滴定法测定保婴散中朱砂(HgS)的含量(2)
(g)加入硫酸量(mL)加入硝酸钾
(g)消耗硫氰酸铵滴定液
(mL)HgS含量
(mg/g)HgS含量平均值
(mg/g)RSD
(%)
14.813830838.9591.795.90.58
22.498730821.0697.8
32.510630820.5695.0
41.207515410.56101.4
51.210315410.0195.7
61.20831549.7793.8
表2 加样回收率试验结果
编号样重
(g)HgS
(g)加入朱砂量
(g)测得量
(g)回收率
(%)平均回收率
(%)RSD
(%)
10.60300.05780.07700.133199.3698.960.55
20.60490.05800.07750.132998.16
32.5106300.07740.133599.34
41.2075150.07730.133799.51
51.2103150.07690.132898.88
61.2083150.07650.131898.46
3 方法与结果
3.1 含量测定方法
取本品约1.2g ......
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