原子吸收法测定碳酸锂缓释片的含量

目的:建立碳酸锂缓释片中测定碳酸锂含量的原子吸收法.方法:采用火焰原子吸收对照品比较法,仪器条件:检测波长:670.8 nm;灯电流:5 mA;狭缝:0.8 nm;背景:不扣背景;乙炔:70 L·h-1;空气:460 L·h-1;燃烧头高度:6 mm.结果:本法精密度、重复性和耐用性良好,平均回收率为100.3％(n=...

AAS determination of lithium carbonate sustained-release tablets

Objective:To establish an atomic absorption spectrophotometry method for determining the content of lithium carbonate sustained-release tablets.Methods:Flame atomic absorption spectrophotometry with external standard method was adopted.The instrument conditions were as follows:the detection wavelength was 670.8 nm;the lamp current was 5 mA;the slit was 0.8 nm;the background mode was no background;the flow rate of acetylene was 70 L·h^-1,the flow rate of air was 460 L·h^-1;the height of burner was 6 mm.Results:The precision,repeatability and robustness were all good,and the average recovery was 100.3%with RSD as 0.7%(n=9).The test results of three batches of samples were 100.1%,99.0%and 100.6%respectively,which had no significant difference with the results obtained from the method of the Chinese Pharmacopoeia method.Conclusion:The validated method can be used for quality control of lithium carbonate sustained-release tablet.