摘要
采用微波消解前处理方法,建立电感耦合等离子体质谱法(ICP-MS)和石墨炉原子吸收光谱法(GFAAS)测定大米粉中铅含量的方法,并进行比较分析。结果表明ICP-MS法和GFAAS法均能对大米粉中的铅元素进行很好的分析测定,校正曲线的相关系数均在0.999以上,线性关系良好;各方法铅元素检出限均小于国标方法要求的检出限,灵敏度较高;加标回收率范围在93.9%~103.2%之间,回收率良好;相对标准偏差RSD值均小于5.0%,精密度良好;大米粉标准物质测定值均在标示值范围内,准确度良好。
A method for the determination of Plumbum in rice flour by inductively coupled plasma mass spectrometry(ICP-MS)and graphite furnace atomic absorption spectrometry(GFAAS)was established and compared by microwave digestion pre-treatment.The results showed that both ICP-MS method and GFAAS method could determine Plumbum in rice flour well,and the correlation coefficients(R)of the calibration curves were all above 0.999,indicating a good linear relationship.The detection limits were all lower than the national standard method,and the sensitivities were high.The recovery is between 93.9%~103.2%.The relative standard deviation were all less than 5.0%,and the precision were good.The determination values of reference substances in rice flour were all within the range of marked values with good accuracy.
作者
吴静
王婧
赵鹏
呼鑫
WU Jing;WANG Jing;ZHAO Peng;HU Shan(Grain Quality Safety Center of Shaanxi Province,710016 Xi'an,China)
出处
《粮食加工》
2023年第2期115-118,共4页
Grain Processing
关键词
电感耦合等离子体质谱法
石墨炉原子吸收光谱法
微波消解
大米粉
铅
inductively coupled plasma mass spectrometry
graphite furnace atomic absorption spectrometry
microwave digestion
rice flour
Pb
