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当前位置: 首页 > 文章 > 微乳液直接进样-石墨炉原子吸收光谱法测定食用油中的锰 食品科学 2011,32 (18) 278-281
Position: Home > Articles > Determination of Manganese in Edible Oil by GF-AAS with Direct Injection of Microemulsion FOOD SCIENCE 2011,32 (18) 278-281

微乳液直接进样-石墨炉原子吸收光谱法测定食用油中的锰

作  者：
陈尚龙;刘全德;李超;李向华
单  位：
徐州工程学院食品工程学院
关键词：
微乳液;直接进样;石墨炉原子吸收光谱法;食用油;锰
摘  要：
建立微乳液直接进样-石墨炉原子吸收光谱法测定食用油中锰的方法,研究微乳液形成的条件以及十二烷基硫酸钠的质量浓度、灰化温度、原子化温度对吸光度的影响。在单因素试验的基础上,通过正交试验确定了最佳测定条件为十二烷基硫酸钠的质量浓度4.0mg/mL、灰化温度900℃、原子化温度1900℃,在此条件下,测定食用油中锰的质量浓度为37.49ng/mL,精密度为1.86%,检出限为0.88ng/mL,加标平均回收率为101.8%,相对标准偏差为3.27%。微乳液直接进样-石墨炉原子吸收光谱法测定食用油中锰,不需要进行复杂的样品前处理,方法快速、准确、无污染,具有较高的实用价值。
译  名：
Determination of Manganese in Edible Oil by GF-AAS with Direct Injection of Microemulsion
作  者：
CHEN Shang-long,LIU Quan-de*,LI Chao,LI Xiang-hua(College of Food Engineering,Xuzhou Institute of Technology,Xuzhou 221008,China)
关键词：
microemulsion;direct injection;graphite furnace atomic absorption spectrophotometry;edible oil;manganese
摘  要：
Graphite furnace atomic absorption spectrophotometry(GF-AAS) coupled with direct injection was used to establish a determination method for manganese in edible oil.The formation conditions of microemulsion and the effects of C12H25NaO4S concentration,ashing temperature and atomization temperature on absorbance were explored.Based on one-factor-at-a-time experiments,the optimal determination conditions were determined by orthogonal array design to be C12H25NaO4S concentration of 4.0 mg/mL,ashing temperature of 900 ℃ and atomization temperature of 1900 ℃.Under the optimal conditions,the content of manganese in edible oil was determined to be 37.49 ng/mL with a relative standard deviation of 1.86% and the detection limit of the method was 0.88 ng/mL.The average recovery rate for manganese in edible oil across three spike concentrations was 101.8% with a relative standard deviation of 3.27%.Therefore,this method is rapid,accurate and applicable without pollution and complex sample pretreatments.

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