食品科学
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王 娟,贺攀红*,杨 珍
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WANG Juan, HE Pan-hong*, YANG Zhen
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摘要:
研究在线双毛细管快速测定海带中微量锶的方法,使用相同管径的双毛细管对酸度和干扰离子进行探讨。采用湿法溶样对样品进行前处理,通过在线加入十二烷基磺酸钠抑制干扰,采用10.0 L/min空气流量和1.2 L/min乙炔流量进行了实验,结果显示:海带中Sr含量在700 μg/g左右。方法检出限为0.1 μg/g,样品回收率在97.8%~107.4%,精密度小于5%。方法准确快速、成本低廉,适合样品中微量锶的测定。经实际样品验证获得较为满意的结果。
关键词: 在线双毛细管, 火焰原子吸收光谱法, 海带, 锶
Abstract:
A rapid method to determine trace amounts of strontium in kelp was proposed using flame atomic absorption spectrometry (FAAS) after sample injection by on-line binary capillary. The impact of acidity and interfering ions on detection of strontium was explored using binary capillaries of the same diameter. Samples were digested with acids, and the interfering ions were effectively suppressed by on-line addition of sodium dodecyl sulfate (SDS). The analysis was carried out at a flow rate of 10.0 and 1.2 L/min for air and acetylene, respectively. Results showed that the content of strontium in kelp was 700 μg/g, as determined by the FAAS method. The limit of detection (LOD) of the method was 0.1 μg/g, the spiked recoveries of strontium in real samples were between 97.8% and 107.4%, and the precision expressed as relative standard deviation (RSD) was less than 5%. This method is accurate, rapid, low-cost and suitable for determination of trace strontium in samples with satisfactory results.
Key words: on-line binary capillary, flame atomic absorption spectrometry, kelp, strontium
中图分类号:
O657.31
王 娟,贺攀红*,杨 珍. 在线双毛细管火焰原子吸收法测定海带中的微量锶[J]. 食品科学, doi: 10.7506/spkx1002-6630-201410036.
WANG Juan, HE Pan-hong*, YANG Zhen. Determination of Trace Strontium in Kelp by Flame Atomic Absorption Spectrometry with On-Line Binary Capillary[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201410036.
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链接本文: https://www.spkx.net.cn/CN/10.7506/spkx1002-6630-201410036
https://www.spkx.net.cn/CN/Y2014/V35/I10/192