火焰原子吸收光谱法连续测定番木瓜中铜锌铁锰
PHYSICAL TESTING AND CHEMICAL ANALYSIS PART B:CHEMICAL ANALYSIS(2003)
Abstract
探讨了用微波消化罐消化样品、用火焰原子吸收光谱法在同一体系中测定番木瓜中微量元素铜、锌、铁、锰的方法.在微波消化罐内用硝酸和过氧化氢消化样品,具有试剂用量少免受污染、消化时间短等优点.考察了硝酸、过氧化氢用量以及消化时间的影响,以及在同一体系中铜、锌、铁、锰的干扰情况.在选定条件下,铜检出限为0.004μg@ml-1,锌检出限为0.0048μg@ml-1,铁检出限为0.002μg@ml-1,锰检出限为0.006μg@ml-1,相对标准偏差为1.7%~4.9%,回收率为96.8%~106.6%.方法具有简便、省时、准确、可靠的优点.
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