分析化学
分析化學
분석화학
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
2014年
11期
1706-1709
,共4页
电感耦合等离子体质谱%微波消解%食品%主%微量元素
電感耦閤等離子體質譜%微波消解%食品%主%微量元素
전감우합등리자체질보%미파소해%식품%주%미량원소
Inductivelycoupledplasmamassspectrometry%Microwavedigestion%Food%Traceelementsand major elements
采用微波消解食品样品后直接进行分析,调节动态反应池DRC( Dynamic reaction cell)的电压参数( Rpa)而不通入气体,选择性抑制高浓度元素K,Na,Ca,Mg,Al的信号强度,同时应用DRC技术有效的消除了m/z 75处40 Ar35 Cl+对砷测定的干扰,建立了电感耦合等离子体质谱法同时测定食品中K,Na,Ca,Mg,Al, Cu,Zn,Pb,As,Mn共10种元素的分析方法。 K,Na,Ca,Mg,Al的检出限为0.013~0.027 mg/L； Cu,Pb,Zn, As,Mn的检出限为0.12~0.61μg/L。采用国家标准物质GBW10023(紫菜),GBW10015(菠菜),GBW10018(鸡肉),GBW10017(奶粉),GBW10019(苹果)和GBW10024(扇贝)进行方法验证,结果准确可信。本方法具有高通量,低成本,样品污染风险小的优点,能够对样品中高低含量的元素同时分析。
採用微波消解食品樣品後直接進行分析,調節動態反應池DRC( Dynamic reaction cell)的電壓參數( Rpa)而不通入氣體,選擇性抑製高濃度元素K,Na,Ca,Mg,Al的信號彊度,同時應用DRC技術有效的消除瞭m/z 75處40 Ar35 Cl+對砷測定的榦擾,建立瞭電感耦閤等離子體質譜法同時測定食品中K,Na,Ca,Mg,Al, Cu,Zn,Pb,As,Mn共10種元素的分析方法。 K,Na,Ca,Mg,Al的檢齣限為0.013~0.027 mg/L； Cu,Pb,Zn, As,Mn的檢齣限為0.12~0.61μg/L。採用國傢標準物質GBW10023(紫菜),GBW10015(菠菜),GBW10018(鷄肉),GBW10017(奶粉),GBW10019(蘋果)和GBW10024(扇貝)進行方法驗證,結果準確可信。本方法具有高通量,低成本,樣品汙染風險小的優點,能夠對樣品中高低含量的元素同時分析。
채용미파소해식품양품후직접진행분석,조절동태반응지DRC( Dynamic reaction cell)적전압삼수( Rpa)이불통입기체,선택성억제고농도원소K,Na,Ca,Mg,Al적신호강도,동시응용DRC기술유효적소제료m/z 75처40 Ar35 Cl+대신측정적간우,건립료전감우합등리자체질보법동시측정식품중K,Na,Ca,Mg,Al, Cu,Zn,Pb,As,Mn공10충원소적분석방법。 K,Na,Ca,Mg,Al적검출한위0.013~0.027 mg/L； Cu,Pb,Zn, As,Mn적검출한위0.12~0.61μg/L。채용국가표준물질GBW10023(자채),GBW10015(파채),GBW10018(계육),GBW10017(내분),GBW10019(평과)화GBW10024(선패)진행방법험증,결과준학가신。본방법구유고통량,저성본,양품오염풍험소적우점,능구대양품중고저함량적원소동시분석。
Aninductivelycoupledplasmamassspectrometric(ICP-MS)methodbasedonquadrupole reaction/collision ( DRC) was developed for the determination of K,Na,Ca,Mg,Al,Cu,Zn,Pb,As and Mn in food. Samples were digested with HNO3 and H2 O2 followed by dilution with ultrapure water and then analyzed directly by ICP-MS. The signal sensitivity of high concentration element ( K, Na, Ca, Mg and Al ) was suppressed easily by adjusting the voltage parameters of DRC quadrupole ( Rpa) , and the food samples could be online diluted any multiples ( i. e. from one time to million times) according to the actual need. In order to eliminate mass spectral interferences of 40 Ar35 Cl+, the operational conditions of the DRC, working with CH4 as reaction gas, were optimized for 75 As. The limits of detection for the K, Na, Ca, Mg, Al varied from 0. 013-0. 027 mg/L, and Cu, Pb, Zn, As, Mnvaried from 0. 12-0. 61 μg/L. The accurate and reliable results were obtained for validation of the ICP-MS method with food reference material according to the national standard GBW10023 , GBW10015 , GBW10018 , GBW10017 , GBW10019 and GBW10024 . As the routine method in our laboratory, the satisfactory results indicate that it has great potential for the determination of low and high concentration level elements by one single analysis in various samples.
