摘要
[目的]研究并优化土壤样品中全量氯离子的前处理方法,并用离子色谱进行测定,考察熔剂、酸度及色谱条件对测定结果的影响.[方法]用硫酸对4种土壤样品（杨凌土、酸性土、甘泉县大棚土和沙土）进行消解后,用离子色谱测定土壤样品中全量氯离子含量.[结果]杨凌土,酸性土、甘泉县大棚土消解后测定时硫酸的体积分数为0.8％,氯离子浓度为1～ 20 mg/L,回收率为97.3％ ～ 100.9,精确度为1.35％ ～ 3.38％.在沙土样品中,残留大量的硫酸浓度,可达363 mg/L,超出仪器的检测线.[结论]通过优化色谱条件,调整淋洗液浓度、泵的流速等,回收率和重现性良好,操作简单,可以快速、准确测定酸消解土壤样品的全量氯离子.
[ Objective ] The full amount of chloride in the soil was analyzed by Ion Chromatography and evaluated the effect of flux, acidity and chromatographic conditions the determination. [ Method] Four soil samples were measured by ion chromatography after sulfuric acid molten at 200 ℃. [ Result] The results showed that, three samples were suitable to the requirements of the ion chromatography. But for sandy soil sam- pies, Residual sulfuric acid concentration greater than the test line, reach 363 mg/L, acid concentration Should be reduced. [ Conclusion] Through optimize the chromatographic conditions; such as eluent concentration, the flow rate of the pump, ion chromatography can quickly and accurately measured full amount of chloride in the soil samples after acid digestion simple operation with good recovery and a high reproducibility.
出处
《安徽农业科学》
CAS
2013年第22期9285-9286,9289,共3页
Journal of Anhui Agricultural Sciences
关键词
硫酸消解
土壤
氯离子
离子色谱
Sulfuric acid digestion
Soil
Chloride
Ion chromatography
