化学分析计量
化學分析計量
화학분석계량
CHEMICAL ANALYSIS AND METERAGE
2015年
4期
65-67
,共3页
石墨炉原子吸收法%化探样品%锡%刚玉坩埚
石墨爐原子吸收法%化探樣品%錫%剛玉坩堝
석묵로원자흡수법%화탐양품%석%강옥감과
graphite furnace atomic absorption spectrometry%geochemical sampl%tin%corundum crucible
建立用C型石墨管和具有赛曼效应的石墨炉原子吸收法测定化探样品中微量锡的方法。样品在刚玉坩埚中用KOH熔融后沸水提取定容，样品溶液酸化后无需加入基体改进剂直接用石墨炉原子吸收法测定。锡的质量浓度在0～20 ng／mL范围内与吸光度呈良好的线性，线性相关系数r2=0.9956，检出限为0.08μg／g。用该法对国家一级标准物质进行测定，测定值在标准值不确定度范围内，重复测定结果的相对标准偏差不大于7.75%(n=12)。该方法操作简便、快速，适用于区域化探样品中微量锡的测定。
建立用C型石墨管和具有賽曼效應的石墨爐原子吸收法測定化探樣品中微量錫的方法。樣品在剛玉坩堝中用KOH鎔融後沸水提取定容，樣品溶液痠化後無需加入基體改進劑直接用石墨爐原子吸收法測定。錫的質量濃度在0～20 ng／mL範圍內與吸光度呈良好的線性，線性相關繫數r2=0.9956，檢齣限為0.08μg／g。用該法對國傢一級標準物質進行測定，測定值在標準值不確定度範圍內，重複測定結果的相對標準偏差不大于7.75%(n=12)。該方法操作簡便、快速，適用于區域化探樣品中微量錫的測定。
건립용C형석묵관화구유새만효응적석묵로원자흡수법측정화탐양품중미량석적방법。양품재강옥감과중용KOH용융후비수제취정용，양품용액산화후무수가입기체개진제직접용석묵로원자흡수법측정。석적질량농도재0～20 ng／mL범위내여흡광도정량호적선성，선성상관계수r2=0.9956，검출한위0.08μg／g。용해법대국가일급표준물질진행측정，측정치재표준치불학정도범위내，중복측정결과적상대표준편차불대우7.75%(n=12)。해방법조작간편、쾌속，괄용우구역화탐양품중미량석적측정。
A method for the determination of trace tin in geochemical samples by graphite furnace atomic absorption spectrometry with Zeeman effect was developed,which required C type graphite tube. The samples were melted by KOH in a corundum crucible,and extracted by boilling water. The sample solution was achieved and tested directly by graphite furnace atomic absorption spectrometry without adding modifier. The mass concentration of tin was linear with absorbance in the range of 0–20 ng/mL, the relative coefficient (r2) was 0.995 6. The detection limit was 0.08μg/g. The method was applied to the detenmination of tin in reference materials and the results were in agreement with the certificated values, the relative standard deviation was 7.75%(n=12). The method is simple and fast,it is suitable for the determination of trace tin in the regional geochemical exploration sample.
