| 摘要: |
| 建立白矾散中白矾含量测定的方法。样品600 ℃灰化2 h后,加稀盐酸溶解,加过量EDTA-2Na配位Al3+,以二甲酚橙为指示剂,用锌滴定液滴定剩余的EDTA-2Na ,从而计算出白矾的含量。经方法学考察,本方法符合含量测定要求,平均回收率为98.6%,RSD为0.7%。所建立的测定方法结果可靠稳定性、重现性好,可用于白矾散的质量控制。 |
| 关键词: 白矾散 白矾 返滴定 含量测定 |
| DOI： |
| 投稿时间：2017-06-02修订日期：2018-01-17 |
| 基金项目: |
|
| Determination of Alum in Baifan Powder by Residual Titration |
|
| (Jiangsu Provincial Institute for Veterinary Drug and Feed Quality Control) |
| Abstract: |
| To establish a quantitative method for alum in baifan power. The sample was dissolved by dilute HCl after it was ashed in 600 ℃ for 2 h. Al3+and EDTA-2Na formed a complex. Using xylene orange as an indicator, excess amount EDTA-2Na was titrated by zinc titration solution. The content of alum can be calculated. Through the study methodology, approach was consistent with determination requirements. The average recovery rate was 98.6% (RSD=0.7%). The method was reliable and stable, with a good reproducibility, which can be applied in quality control of baifan power. |
| Key words: Baifan Powder Alum Residual Titration Determination |
