摘要
采用氧弹燃烧法对海藻酸钠样品进行燃烧,用碳酸钠作为吸收液进行吸收,建立了离子色谱–抑制电导法检测海藻酸钠中阴离子的方法。实验采用SH–AC–1型离子交换色谱柱,最佳色谱条件:以3.6 mmol/L碳酸钠为淋洗液,柱温45℃,流速0.7 mL/min。在此条件下,可同时分离Cl–、SO42–离子,且色谱峰型对称,所测Cl–、SO42–离子的检出限(S/N=3)分别为0.005、0.011 mg/L。用该方法测定Cl–、SO42–离子,相对标准偏差小于%(n=7),加标回收率分别为96%～107%、97%～104%。方法简单、准确、可靠,具有较好的实用性。
The determination method of anion in sodium alginate by oxygen bomb combustion-ion chromatography suppressed conductivity detection with sodium carbonate aqueous solution as adsorption solution was established.SH-AC-1 ion exchange column was used, the selected chromatographic conditions as follows： 3.6 mmol/L sodium carbonate was as the eluent, column temperature was 45 %, the flow rate was 0.7 mL/min.In these conditions, the separation of CI-, SO4^2-was carried out with symmetric peak. The detection limit of C1 was 0.005 mg/L, and SO4^2- - was 0.011 mg/L. The RSDs of determination result were no more than 2% （n=7）. The recoveries of CI-, SO42- were 96%-107%, 97%-104%, respectively. This method is simple, accurate, reliable, and has better practical applicability.
出处
《化学分析计量》
CAS
2011年第6期30-32,共3页
Chemical Analysis And Meterage
基金
科技型中小企业技术创新基金项目(09C26213711749)
关键词
离子色谱
氧弹燃烧法
海藻酸钠
阴离子
ion chromatography, oxygen bomb combustion, sodium alginate, anion
