南通地区部分稻谷中铅、镉、铬及无机砷的污染状况分析

目的:测定南通地区部分稻谷中铅、镉、铬及无机砷含量,为安全食用提供依据。方法:采用微波消解处理样品,使用电感耦合等离子体质谱仪(ICP-MS)、液相色谱-原子荧光谱仪进行测定,并根据GB 2762-2017国家标准,采用单因子污染指数法和重金属综合污染指数法进行评价。结论:两个地区40份稻谷普遍存在重金属污染,且铬污染较严重。     

高压釜消解-ICP-OES法测定涂料催干剂中铅、镉、硫元素

研究用高压釜消解-ICP-OES测定印刷线路板中重金属元素Pb,Cd及S的含量。结果表明,方法灵敏、快速、准确、操作方便,实用性强。Pb,Cd,S的回收率在96.0%-97.8%之间,相对标准偏差RSD〈5%。     

微波消解-ICP-AES法测定土壤中铅、砷、铬、镉和汞

本文采用硝酸+双氧水+氢氟酸辅以微波消解的样品处理技术,结合ICP-AES法测定土壤中样品中Pb、As、Cr、Cd、Hg等重金属的含量。结果表明,该方法与传统的酸解法样品处理具有操作简单、快速高效、污染少、结果可靠等优点,完全能满足环境分析的要求。     

石墨炉原子吸收光谱法测定绿茶中的镉、铅

本文采用微波消解绿茶样品,利用石墨炉原子吸收法测定市售几种知名绿茶中的镉、铅的含量。实验结果表明不同省份的绿茶中镉、铅含量有不同的分布规律,其中浙江省西湖龙井茶中的镉和铅的检出限分别为0.067和1.05μg/L,回收率分别81.11～116.23%和87.05～118.68%。相对标准偏差分别3.2～5.9%和3.1～5.5%。该方法分析速度快,结果准确,适合测定绿茶中的镉和铅。     

ICP－AES法测定工业废水中铬镍锌铜镉含量EI

研究了采用ＩＣＰ－ＡＥＳ田法测定工业废水中Ｃｒ、Ｎｉ、Ｚｎ、Ｃｕ和Ｃｄ含量的试验方法。该法用于国家标准水样和工业废水样品分析，获得满意的结果，并产生了经济和社会效益。     

原子吸收光谱法测定铅镉锌分析

原子吸收光谱法因其在测定镉、铅、锌等元素含量时有着灵敏度高以及成本低的特性而得到广泛应用，其中以火焰法和石墨炉法应用最为广泛。本文主要对原子吸收光谱法的进展进行阐述以及进行试验研究。     

活性炭动态吸附ICP-AES法测定粗铅中的金

该文建立活性炭动态吸附-电感耦合等离子发射光谱测定粗铅中金的方法。通过实验确定粗铅样品的取样方法,采用硝酸-王水溶样-活性炭动态吸附富集金,这一过程可实现共存干扰元素的分离;灼烧灰化,以王水溶解金定容。在选定的仪器工作条件下采用电感耦合等离子体发射光谱(ICP-AES)测定其中的金含量。结果表明,方法检出限为0.066μg/g,标准加入回收率为96.0%～104.0%,相对标准偏差(RSD)为1.03%～4.01%,具有良好的准确度和精密度,测定结果与火试金测定结果吻合。该方法高效、环保,结果可靠,适用于大批量粗铅样品的测定。     

ICP-AES法测定高纯铅中痕量的铁、镉、镍

本文建立了在电感耦合等离子体光谱仪上测定高纯铅中痕量铁、镉、镍的方法。采用硝酸溶解试样,用硫酸沉淀大量基体铅,在5%硝酸介质中用ICP-AES法测定上层清液,并对该方法的检出限、沉淀吸附、准确度、精密度等做了实验,测定范围为0.00002%-0.0005%,回收率为97%-107%,变异系数2%。该方法操作简便快捷,适合日常生产分析。     

用ICP-AES法测定氰化镀银溶液中铜、铁、铅、镉、钙、镁含量

以硝酸和盐酸破坏银氰化合物,使氰化物和银分别以氢氰酸气体和氯化银沉淀形式除去,用ICP-AES法连续测定了铜、铁、铅、镉、钙、镁的含量.结果表明,方法检出限为0.001 5～0.110 0 μg/mL,加标回收率在89%～124%之间.用于氰化电镀银溶液杂质元素测定,结果令人满意.     

用ICP-AES法测定电镀铬废水中的铬含量

铬是水质监测的重要指标,较高浓度对人体有害.采用ICP-AES标准曲线法,测定了电镀铬废水中的铬含量,获得了检测波长为205.560,206.158 nm和267.761 nm的标准曲线方程.试验结果表明,267.761 nm检测波长下,铬离子发射强度大、信背比和灵敏度高,其标准曲线线性相关系数为0.9998,回收率为105.4%,RSD为0.606%～2.559%.采用ICP-AES法测定电镀废水中的铬,结果表明,此方法简便快捷,准确性好,精密度高.     

ICP-AES法测定螺旋藻中的杂质元素铝

探讨用ICP-AES技术测定螺旋藻中杂质元素铝,并对共存元素光谱干扰及其消除进行研究,所建立的分析方法,快速、结果准确,有较好的精密度和准确度,适用于螺旋藻中铝的测定。     

电感耦合等离子体发射光谱法测定矿石中银的研究

目前,实验室测定矿石中银的方法主要有银的光度法、火焰原子吸收光谱法、石墨炉原子吸收光谱法等等,为了更好的简化测量过程、提高工作效率,本文旨在建立更适宜的、能满足于高中低含量银的测试方法,采用电感耦合等离子体光谱法测定金属矿中银的含量.样品采用氢氟酸、硝酸、硫酸(体积比10∶5∶1)溶解,赶净氟和破坏有机物后,经(1+1...     

Determination of impurities in aluminum isopropoxide by inductively coupled plasma atomic emission spectrometry

A procedure has been developed for the determination of impurities in aluminum isopropoxide by inductively coupled plasma atomic emission spectrometry. The matrix effect has been compensated by adding a Bi internal standard. The detection limits of impurities are 10⁻⁷ to 10⁻⁵ wt %.     

采用电感耦合等离子体质谱测定化肥中微量Cr、Cd、As、Pb、Hg元素

采用电感耦合等离子体质谱法测定化肥中微量Cr、Cd、As、Pb、Hg元素。仪器经条件优化，以In为内标，样品的基体效应和仪器漂移能得到很好的补偿。微波消解和敞开酸溶两种样品处理方法比较可知，微波法具有更高的精密度和准确度。方法的标准加入回收率在85-120％，RSD％〈15％，误差完全符合GB18877-2002的规定，方法简便快速。     

Determination of phosphorous and sulfur in environmental samples by electrothermal vaporization inductively coupled plasma atomic emission spectrometry

From the viewpoint of selective introduction of the analyte from its solvent and matrices, electrothermal vaporization (ETV) is useful for the sample introduction into the inductively coupled plasma (ICP). By using a tungsten boat furnace (TBF) vaporizer system, the loss of analyte phosphorus, which normally occurs during the drying and ashing stages, is suppressed. The phosphate ion is reacted with the tungsten supplied from the surface of the TBF to form stable tungsten phosphate species. Regarding the determination of sulfur, additional chemical modifiers such as copper(II), lead(II), etc., are necessary to retain the analyte on the TBF. The furnace-fusion (FF) method or wet-digestion technique on the TBF is applied to unify the chemical forms of the analytes. Various oxidative and reductive inorganic compounds as well as organic compounds of phosphorus and sulfur show the same sensitivities after the FF digestion with hydrogen peroxide. The detection limits are 1.5 ng and 0.12 ng for phosphorous and sulfur, respectively. The repeatabilities in terms of the relative standard deviations of 10 replicate measurements of phosphorus and sulfur are 4.2% and 2.0%, respectively. Finally, the established method is applied to the determination of several environmental waters.     

Analysis of pure scandium,yttrium, and their oxides using methods of inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry

The analytical possibilities of direct detection of rare earth and non-rare-earth impurities in pure scandium, yttrium, and their oxides using the ICP-AES and ICP-MS methods are investigated. The analytical lines and isotopes of the sought elements that are the most free from folding are selected. The effect of the sought impurities of the matrix elements on the analytical signal is studied. The detection and determination limits for impurities in scandium and yttrium are estimated. The lower limits of determining impurities in scandium, yttrium, and their oxides at the level of n × 10⁴ mass fractions, %, are reached using the ICP-AES method; those at the level of n × 10⁻⁶ mass fractions, %, are reached using the ICP-MS method. The joint application of the ICP-AES and ICP-MS methods for the analysis of standard specimens of yttrium and scandium oxide is implemented. The control of the validity is accomplished by comparing the obtained results with the certified values of standard specimens and by the method of addition.     

Determination of Cd, Cr, Hg and Pb in plastics from waste electrical and electronic equipment by inductively coupled plasma mass spectrometry with collision-reaction interface technology

A procedure based on the use of a quadrupole inductively coupled plasma-mass spectrometer equipped with a collision-reaction interface (CRI) for control of spectral overlap interferences was developed for simultaneous determination of Cd, Cr, Hg, and Pb in plastics from waste electrical and electronic equipment (WEEE). The injection of H(2) and He (80 and 60 mL min(-1), respectively) into the sampled plasma, colliding and reacting with potentially interfering polyatomic ions, allows interference-free determination of chromium via its isotopes (52)Cr and (53)Cr that are freed from overlap due to the occurrence of (40)Ar(12)C(+), (40)Ar(12)C(1)H(+), (36)S(16)O(+) or (1)H(36)S(16)O(+). Cadmium, Hg and Pb were directly determined via their isotopes (110)Cd, (111)Cd, (112)Cd, (199)Hg, (200)Hg, (201)Hg, (202)Hg, (206)Pb, (207)Pb, and (208)Pb, without using CRI. The CRI can be quickly activated or deactivated before each analyte measurement. Limits of detection for (52)Cr were 0.04 or 0.14 μg L(-1) with He or H(2) injected in CRI. Cadmium and Pb have LODs between 0.02 and 0.08 μg L(-1) and Hg had 0.93-0.98 μg L(-1), without using CRI. Analyte concentrations for samples varied from 16 to 43, 1 to 11, 4 to 12, and 5 to 13 mg kg(-1) for Cr, Cd, Hg and Pb, respectively.     

Determination of boron in high-aluminum semiproduct by inductively coupled plasma atomic emission spectroscopy

A method to determine boron in a high-aluminum semiproduct by ICP-AES is described. The detection limit is 0.012 wt %. The iron and chromium spectral noise affecting the most sensitive boron lines is studied. It is shown that the Al₂O₃ matrix does not influence the intensity of the analytical signal. The ways to decompose a probe by melting together are compared.