Determination on Heavy Metals Content of Achyranthes bidentata Blume. through Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

[Objective] The inductively coupled plasma mass spectrometry(ICP-MS)was constructed to determine the contents of lead,cadmium,mercury and arsenic in Archyranthes bidentata Blume.[Method]Under the optimum operation condition of ICP-MS,the samples were digested by microwave.The element 114In was taken as an internal standard element to compensate body effect and ICP-MS method was used to determine the contents of lead,cadmium,mercury and arsenic.[Result]For the determined elements,the correlation coefficient(r)of standard curve was over 0.9995 and recovery rate was from 96.7% to 106.4% while RSD was less than 11.2%.The result of determination showed that the heavy metal content in Archyranthes bidentata Blume.beyond standard was serious.[Conclusion]The constructed ICP-MS method with simple operation,rapid response,accuracy and high sensitivity in this experiment could be used for quality control of Chinese medicinal materials by detecting heavy metal contents in different Chinese medicinal materials from original places.

Inductively coupled plasma mass spectrometry (ICP-MS) and its application in life sciences

Inductively-coupled plasma mass spectrometry (ICP-MS) has made much progress since its birth in the late 1990s. This paper will give a rather systematic overview on the use of this technique in new devices and technologies related to plasma source, sample-introducing device and detecting spectrometer etc. In this overview, an emphasis will be put on the evaluation of the ICP- MS technique in combination with a series of physical, chemical and biological techniques, such as laser ablation (LA), capillary electrophoresis (CE) and high performance liquid chromatograph (HPLC), along with their representative high accuracy and high sensitivity. Finally, comprehensive and fruitful applications of the ICP-MS and its combinative techniques in the detection of trace metallic elements and isotopes in complex biological and environmental samples will be revealed.

Determination of impurity elements in MnZn ferrites by inductively coupled plasma mass spectrometry

An inductively coupled plasma mass spectrometry(ICP-MS) method was developed for the determination of Na, Mg, Al,K, Ca, Ti, Cr, Co, Ni, Cu, Ga, As, Mo, Ag, Cd and Pb in MnZn ferrites. The sample was digested by HNO3+HCl with microwave digestion followed by dilution with ultrapure water, then the above 16 impurity elements in the solution were analyzed directly by ICP-MS. The impurity elements were introduced by the helium gas or hydrogen gas into the octopole reaction system(ORS) to eliminate the polyatomic interferences caused by the high salty matrixes. The matrix effect was minimized through matrix matching,and Be, Y and Rh were used as internal standard elements. The working parameters of the instrument were optimized. The results show that the method has good precision and high accuracy. The detection limits for the investigated elements are in the range of0.9-37.5 ng/L, the relative standard deviation of each element is within 1.1%-4.8%, and the recovery of each element is 90%-108%.

Uncertainty Evaluation of Simultaneous Determination of Lead, Cadmium and Arsenic in Cosmetics by Inductively Coupled Plasma Mass Spectrometry

This study aimed to evaluate the uncertainty of simultaneous determination of lead(Pb),cadmium(Cd)and arsenic(As)in cosmetics by microwave digestion-inductively coupled plasma mass spectrometry(ICP-MS)with ^72Ge,^115In and ^209Bi as internal standards.According to the method of Safety and Technical Standards for Cosmetics(2015),a mathematical model was established to evaluate the sources and components of uncertainty for the determination of lead,cadmium and arsenic in cosmetics.The results showed that the uncertainties in the determination of lead,cadmium,and arsenic elements in cosmetics were(10.1±0.6)mg/kg,k=2,(4.84±0.28)mg/kg,k=2,(2.04±0.18)mg/kg,k=2,respectively.The main factors that affect the uncertainty of determination results were standard substance,calibration curve,recovery and measurement repeatability.

ICP-MS法分析过氧化氢、硝酸、硫酸中的金属杂质

Inductively coupled plasma mass spectrometry (ICP-MS) was used to detect trace metal impurities in reagents such as H2O2, HNO3and H2SO4. The limit of detection to metal elements can be down to 2-20 ng/L in H2O2 and HNO3 and 0.1-1.0 ng/L in H2SO4.

ICP-MS测定硼矿区饮用水和尿样中的硼及多种元素

The application of inductively coupled plasma mass spectrometry (ICP-MS) for determination of boron in water and urine samples was described. The detect limit (3σ) was 0.057 μg/L. The precision of the method was less than 2%. Multi-elements including Cr, Cu, Cd, Ba, Sr, Mn, Co, Tl, Li, Pb, Ca, Fe, K, Na, Mg, P, Si and Zn could be measured simultaneously. The method was successfully used in practice.

基于ICP-MS分析牡丹皮不同炮制品煎液及沉淀物重金属转移率变化

目的:研究牡丹皮不同炮制品(牡丹皮、酒牡丹皮、牡丹皮炭)分别在煎液和沉淀物中重金属转移率的变化,对牡丹皮不同炮制品中Cu、As、Cd、Hg、Pb共5种重金属的含量进行检测,算转移比例。方法:用电感耦合等离子体质谱法(ICP-MS),以微波消解样品,以In、Ge、Sc为内标,标准物质建立Cu、As、Cd、Hg、Pb等5种重金属的ICP-MS测定方法,并测定牡丹皮不同炮制品(牡丹皮、酒牡丹皮、牡丹皮炭)中的饮片、煎液、沉淀中5种重金属的含量,并通过换算重金属从饮片中转移到煎液与沉淀中的比例。结果:酒炙后的牡丹皮中As的总转移率提高,Cu、Pb总转移率略有降低,Cd、Hg的总转移率略升高;炭制后的牡丹皮中Cu、Pb、As、Cd、Hg的总转移率明显降低。结论:结果显示不同的炮制方法对牡丹皮中重金属的转移率是有所影响的。

采用ICP-MS/MS准确测定食品中钙和氯

建立利用电感耦合等离子体串联质谱测定食品中钙和氯的分析方法。针对Ca的高丰度同位素^(40)Ca受到来自等离子气^(40)Ar的干扰,35 Cl受到来自^(16)O^(18) OH的严重干扰,在MS/MS模式下,利用碰撞/反应池技术,以H_2为反应气,使^(40)Ar^+与H_2发生反应,而^(40)Ca^+不与H_2发生反应,利用H_2原位质量法消除^(40)Ar^+对^(40)Ca^+的干扰;而^(35)Cl^+则能与H_2发生质量转移反应生成H2^(35)Cl^+,通过测定H_2^(35)Cl^+消除^(16)O^(18) OH^+对^(35)Cl^+的干扰。Ca和Cl在0.0～100.0μg·L^(-1)的浓度范围内线性关系良好,线性相关系数(R^2)≥0.9999,Ca和Cl的检出限分别为0.061和2.32μg·L^(-1)。采用系列国家标准物质验证了对方法的准确性和精密度,其测定结果与标准参考物质的认定值基本一致,表明方法的准确性好、精密度高。所建立的新方法可实现食品中钙和氯的准确测定。

Determination of Pb, Cr, Ni and Mn in Tap Water of Riyadh Metropolitan City Using ICP-MS after Preconcentration with Multiwalled Carbon Nanotubes

The determination of toxic metals in water using multiwalled carbon nanotubes （MWNTs） as a solid-phase extraction adsorbent prior to their determination by inductively coupled plasma mass spectrometry （ICP-MS） has been investigated. Standard addition method was applied for the calibration using aqueous solutions. Multiwalled carbon nanotubes （MWNTs） absorb these metals at pH 8.0, HNO3 of 1.0 mol-Ll is used for complete elusion of these metals from MWNTs. Previously investigated parameters have been applied for the determination of Pb, Cr, Ni and Mn in tap water samples. Fifteen tap water samples from different locations of Riyadh metropolitan area have been determined by ICP-MS after preconcentration with MWNTs.

基于ICP-MS法测定犬粮中6种有害元素及其健康风险评估

试验建立了犬粮中6种重金属[汞(Hg)、铅(Pb)、砷(As)、镉(Cd)、铜(Cu)、铬(Cr)]多残留电感耦合等离子体质谱(ICP-MS)的检测方法。犬粮样品经微波消解后质谱检测,6种有害元素的检出限在0.003-0.010 mg/kg之间;线性范围在0.1-100.0μg/L内各成分的线性相关系数均大于0.999;样品在定量限1倍、2倍和10倍3个添加水平下的平均回收率为91.9%-105.1%,相对标准偏差为2.6%-8.3%。采用单因子污染指数、综合因子污染指数法对犬粮中6种有害元素的食用安全性进行评价。结果表明,综合因子污染指数大小顺序为:中幼型犬粮>通用型和成犬粮>老年犬粮。

Determination of Fe, Cu, and Zn in Water Samples by Microcolumn Packed with Multiwalled Carbon Nanotubes as a Solid Phase Extraction Adsorbent Using ICP-MS

The heavy metals determination in tap water samples using microcolumn packed with multiwalled carbon nanotubes （MWNTs） as a solid-phase extraction adsorbent before to their determination by inductively coupled plasma mass spectrometry （ICP-MS） has been studied. Standard addition method was applied for the calibration using aqueous solutions. The metals ions absorption were achieved by multiwalled carbon nanotubes （MWNTs） at pH 8.0, and then these retained metals on MWNTs column were eluted by 1.0 mol.L^-1 HNO3. The analytical parameters for the determination ofFe, Cu, and Zn in tap water samples which have been investigated previously were applied. Fifteen tap water samples were collected from different locations of Riyadh metropolitan area and then determined the concentration ofFe, Cu, and Zn by ICP-MS after preconcentration with MWNTs. The concentration range for Fe, Cu, and Zn measured （μg/L） in water samples are 23.37-137.91, 2.12-121.36, and 14.43-202.47 respectively. The level of Fe exceeded the limits set by WHO and SASO for drinking water.

Y(OH)_3共沉淀分离电感耦合等离子体质谱法测定锌精矿中10种杂质元素

采用盐酸和硝酸溶样，Y（OH）3共沉淀分离锌，电感耦合等离子体质谱法（ICP-MS）同时测定锌精矿中Cu，Fe，Cd，Ag，Ni，Pb，Sn，As，Sb，Bi。详细地讨论了仪器工作参数、内标元素、分离条件、样品基体的干扰，确定了最佳测定条件。结果表明，方法的检出限为0．004～0．24μg／L，回收率为90．0％～110．0％，相对标准偏差小于4．58％。方法已用于锌精矿中杂质元素的测定。

Pt-Os同位素系统定年方法研究

Six massive ores in the Jinchuan deposit were dated by Re-Os technique. The Os concentrations and isotopic ratios were determined by N-TIMS, while Re and Pt concentrations were determined by ICP-MS. The samples gave an isochron age of (852±25) Ma with an initial 187Os/188Os ratio of 0.255 ± 0.014. A 7-point Pt-Os isochrone gives an age of (870±38) Ma with an initial 186Os/188Os ratio of 0.119 84±0.000 27.

烟用接装纸质控样品的制备与应用

采用深珠光印字烟用接装纸作为质控样品,用微波消解处理质控样品,以电感耦合等离子体质谱法(ICP–MS)对样品的铬、砷、铅含量进行定值,并进行不确定度评定。利用方差分析评价均匀性,ADF检验评价稳定性。经F检验表明在95%的置信区间,制备的烟用接装纸质控样品均匀性良好;经ADF检验表明,各元素在1%的显著水平下稳定可靠,样品稳定性良好。将烟用接装纸质控样品用于质控,并绘制Levy–Jennings质控图,质控效果良好。

电感耦合等离子体质谱法分析废水中痕量碲、锑和镍的研究

本文应用电感耦合等离子体质谱(ICP-MS)技术,测定了废水中碲、锑和镍的含量。实验选用^(125)Te、和^(128)Te、^(121)Sb和^(123)Sb、^(60)Ni和^(62)Ni同位素作为测试对象。试样经过封闭加热系统的预处理,然后用标准工作曲线法和标准加入法进行对比研究,得到了一致的结果。试样中Te、Sb和Ni的浓度高于10μg/L时,测试的相对标准偏差为1～3％。对250和2000μg/L标样的实测值和标准值的相对偏差为0.8～2％。^(125)Te、^(128)Te、^(121)Sb、^(123)Sb、^(60)N和^(62)Ni的检测限分别为0.05、0.02、0.03、0.03、0.06和0.1μg/L。^(62)Ni有较高的检测限,是因为它的同位素丰度偏低(3.71％)。

碰撞反应池等离子体质谱测定有机酸盐中杂质元素

建立有机酸盐中Pb、Cd,Cr、As、Fe、Cu、Mn、Co、Ni、Sb等10种杂质元素的微波消解碰撞反应池技术电感耦合等离子体质谱法。通过基体匹配、正确选择测量同位素及内标元素后,有效地克服了因高钙、高钠基体效应带来的测量偏差,极大的消除了多原子离子对待测元素的干扰,使有机酸盐中杂质元素的测试更为准确。方法的检出限为0.015 mg/kg^1.5 mg/kg之间,回收率均在90.0%~110.0%之间,相对标准偏差为2.01%~10.3%。

硒化枸杞多糖的制备及其抗氧化性研究

以亚硒酸钠和枸杞多糖为原料合成硒化枸杞多糖,电感耦合等离子体质谱法(ICP-MS)测定其中硒含量为64.42 mg/g。利用紫外-可见光谱、红外光谱两种表征手段,证实了硒化枸杞多糖的合成。采用邻二氮菲-Fe2+氧化法和邻苯三酚自氧化法测定硒化枸杞多糖的抗氧化能力,结果表明,在实验设置的浓度范围内,硒化枸杞多糖的抗氧化能力随着浓度的增加而增加,且高于枸杞多糖。2.0 mg/mL的枸杞多糖和硒化枸杞多糖对超氧阴离子自由基的清除率分别为51.48%和59.34%,对羟自由基的清除率分别为50.23%和56.16%。本实验为进一步研究硒化枸杞多糖作为抗氧化能力较强的食品和药品的可能性奠定了基础。

电感耦合等离子体质谱测定大气铅污染物

Inductively coupled plasma mass spectrometry(ICP-MS) was used to determine the concentration of Pb in atmospheric particulate samples,and the enrichment factor was calculated.The causes of the results were also discussed.

Multielement determination in orange juice by ICP-MS associated with data mining for the classification of organic samples

The aim of this study was to discriminate organic from conventional orange juice based on chemical elements and data mining applications.A comprehensive sampling of organic and conventional oranges was carried out in Borborema,state of Sao Paulo,Brazil.The fruits of the variety Valencia(Citrus sinensis(L.)Osbeck)budded on Rangpur lime(Citrus limonia Osbeck)were analyzed.Eleven chemical elements were determined in 57 orange samples grown in organic and conventional systems.In order to classify these samples,data mining techniques(Support Vector Machine(SVM)and Multilayer Perceptron(MLP))were combined with feature selection(F-score and chi-squared).SVM with chi-squared had a better performance compared with the other techniques because it reached 93.00% accuracy using only seven chemical components(Cu,Cs,Zn,Al,Mn,Rb and Sr),and correctly classified 96.73% of the samples grown in an organic system.

精神科常用中草药的微量元素检测

目的分析柴胡、姜半夏、淡竹叶、夏枯草、白术、玫瑰花、生地、丹参、甘草、百合、黄芪和黄连这12种精神科常用中草药中的铍、钠、镁、钾、钙、钒、铬、锰、铁、钴、镍、铜、锌、砷、硒、钼、镉、锑、钡、汞、铊、铅、钍和铀水平。方法选取精神科常用12种中草药作为研究对象,利用电感耦合等离子体质谱法测定微波消解法制备后样品中的24种微量元素水平,对测定结果进行分析、比较。结果各元素在参考范围内线性良好,相关系数均大于 0.999 ,加标回收率为91.14%~113.01%,相对标准偏差(n=6)为2.9%~6.5%。结论微量元素的总量在12种不同中草药中的差异较大,不同中草药中不同微量元素的水平分布不同。