河南农业科学
河南農業科學
하남농업과학
JOURNAL OF HENAN AGRICULTURAL SCIENCES
2015年
6期
125-127
,共3页
微波消解%火焰原子吸收光谱法%刺梨%元素
微波消解%火燄原子吸收光譜法%刺梨%元素
미파소해%화염원자흡수광보법%자리%원소
microwave digestion%FAAS%Rosa roxburghii Tratt%elements
通过正交试验优化刺梨微波消解条件,并采用火焰原子吸收光谱法测定刺梨中Fe、Mg、Mn、Zn、Cu、Pb、Cd等7种元素的含量。结果表明,优化的刺梨消解程序为：采用HNO3-H2 SO4(4∶1)混合酸体系,固液比1∶20,微波功率600 W,消化温度140℃保持4 min。原子吸收光谱法测定7种元素的含量,方法检出限为0.003~0.080μg/mL,方法的加标回收率在96.25%~104.20%,相对标准偏差(RSD)小于3.04%,具有较好的准确度和精密度。测定结果显示,刺梨中Fe、Mg、Zn等含量丰富,Mn和Cu含量中等,而有毒金属元素Cd、Pb含量较低。
通過正交試驗優化刺梨微波消解條件,併採用火燄原子吸收光譜法測定刺梨中Fe、Mg、Mn、Zn、Cu、Pb、Cd等7種元素的含量。結果錶明,優化的刺梨消解程序為：採用HNO3-H2 SO4(4∶1)混閤痠體繫,固液比1∶20,微波功率600 W,消化溫度140℃保持4 min。原子吸收光譜法測定7種元素的含量,方法檢齣限為0.003~0.080μg/mL,方法的加標迴收率在96.25%~104.20%,相對標準偏差(RSD)小于3.04%,具有較好的準確度和精密度。測定結果顯示,刺梨中Fe、Mg、Zn等含量豐富,Mn和Cu含量中等,而有毒金屬元素Cd、Pb含量較低。
통과정교시험우화자리미파소해조건,병채용화염원자흡수광보법측정자리중Fe、Mg、Mn、Zn、Cu、Pb、Cd등7충원소적함량。결과표명,우화적자리소해정서위：채용HNO3-H2 SO4(4∶1)혼합산체계,고액비1∶20,미파공솔600 W,소화온도140℃보지4 min。원자흡수광보법측정7충원소적함량,방법검출한위0.003~0.080μg/mL,방법적가표회수솔재96.25%~104.20%,상대표준편차(RSD)소우3.04%,구유교호적준학도화정밀도。측정결과현시,자리중Fe、Mg、Zn등함량봉부,Mn화Cu함량중등,이유독금속원소Cd、Pb함량교저。
The microwave digestion conditions of Rosa roxburghii Tratt were optimized by orthogonal test, and then the contents of seven trace elements, including Fe, Mg, Mn, Zn, Cu, Pb and Cd in Rosa rox-burghii Tratt were determined by flame atomic absorption spectrometry ( FAAS ) . The results showed that the optimum conditions were as follows:the digestion agent was HNO3-H2SO4(4∶1),the solid-liquid ratio was 1∶20,the microwave power was 600 W,the digestion temperature was 140 ℃ and the hold time was 4 min. The detection limits were 0. 003—0. 080 μg/mL,and the recoveries of the FAAS method were between 96 . 25%—104 . 20%, the relative standard deviations ( RSD ) were lower than 3 . 04%. These figures showed that the FAAS method gave good accuracy and precision. The analytical results indicated that the contents of Fe,Mg,Zn were rich,the contents of Mn and Cu were medium,and the contents of Pb and Cd were low.
