电感耦合等离子体原子发射光谱(ICP-AES)法测定四种奶片中的钙和镁

采用HNO3-HClO4混酸体系溶解奶片,电感耦合等离子体原子发射光谱法测定试样中的钙和镁含量,结果表明非糖果型奶片中钙和镁的含量较高。通过加标回收实验,钙和镁的加标回收率为96.7%～101%,相对标准偏差均小于3%,方法准确、快捷,为研究奶片在儿童成长发育中的作用提供了相关的依据。     

电感耦合等离子体发射光谱(ICP-OES)法测定橘子汁中钙和镁

建立了微波消解和湿法消解对样品进行前处理,电感耦合等离子体发射光谱法(ICP-OES)测定橘子汁样品中钙和镁含量的方法。选择Ca 317.933nm,Mg 285.213nm作为钙和镁的分析线。实验结果表明,钙和镁的检出限分别为0.001 8和0.000 4mg/L,相对标准偏差(RSD2%),加标回收率为99%~101%,用来测定FAPAS国际比对橘子汁样品,反馈的统计结果显示钙和镁元素的Z值分别为-0.3和0.3,结果均为满意。方法快速、简单、精确,适于橘子汁中钙和镁的测定。     

电感耦合等离子体原子发射光谱(ICP-AES)法测定锌锭中的微量元素

建立了电感耦合等离子体原子发射光谱(ICP-AES)法测定锌锭中的Pb、Cd、Fe、Cu、Sn 5种杂质元素的方法。样品用硝酸(1+1)溶解后,在稀硝酸介质中利用电感耦合等离子体原子发射光谱仪测定其中Pb、Cd、Fe、Cu、Sn的含量,测定的相对标准偏差(RSD,n=3)小于1.7%,对锌光谱标样BYG0505的测定结果与标准值基本一致。实现了对锌锭中多种杂质元素的简便、快速、准确的同时测定。     

电感耦合等离子体原子发射光谱法测定工业电解质中钙、镁、锂

工业电解质中微量元素钙、镁、锂对电解槽的正常运行非常重要。本文采用高氯酸加热挥发除氟,以盐酸(1 1)溶解残渣,选用Ca317.9nm、Mg297.5nm、Li670.7nm作为分析谱线,考察了样品处理方法、共存元素干扰对测定结果的影响。建立了电感耦合等离子体原子发射光谱法测定工业电解质中钙、镁、锂的方法。结果表明：不同的电解质因其所含氧化铝的不同会有部分不溶杂质,但对微量元素的测定影响很小,可以忽略不计。共存元素铝和钠不干扰微量元素的测定。按照试验方法对2个电解质标准样品进行了测定,其测定值与标准值吻合。同时对不同电解槽的工业电解质样品进行了分析,其结果的相对标准偏差(RSD,n=11)在0.69%-5.68%之间,满足生产分析的需要。     

电感耦合等离子体原子发射光谱(ICP-AES)法测定磷酸中的金属元素

建立了一种用电感耦合等离子体原子发射光谱(ICP-AES)法测定磷酸中金属元素的分析方法。磷酸用超纯水稀释10倍后直接测定,方法的检出限可达到0.001 2～0.051 6μg/g,加标回收率达到95%～105%,满足实际样品分析要求。     

电感耦合等离子体原子发射光谱(ICP-AES)法测定硒片中的硒、铁、钙和锌

用HNO_3-HClO_4(4∶1)溶解硒片,电感耦合等离子体原子发射光谱(ICP-AES)法测定其中的硒、铁、钙和锌,实验表明硒片中硒、铁、钙和锌的含量较为丰富,与外包装承诺的含量一致。方法灵敏可靠,测量相对标准偏差3%,加标回收率在96.5%~101%,实验结果为探讨硒片对人体的保健作用提供了参考数据。     

电感耦合等离子体原子发射光谱法测定植物中钾、钠、钙和镁

摘要：采用硝酸-高氯酸湿法消解或硝酸-双氧水微波消解植物样品,以电感耦合等离子体原子发射光谱法同时测定样品溶液中钾、钠、钙和镁含量。用该法测定灌木枝叶和茶叶标准样品,测定值均在标准值范围内,测定结果的相对标准偏差为0.45%～4.05% (n=8)。钾、钠、钙、镁的加标回收率分别为94.4%～107.6%,92.6%～107.9%,93.7%～105.4%,92.9%～107.2%。该方法操作简便,测量精密度和准确度完全满足植物中钾、钠、钙和镁含量的测定要求。     

电感耦合等离子体原子发射光谱(ICP-AES)法测定硅锆合金中的铝和钙

通过硝酸、氢氟酸和盐酸分解试样,高氯酸冒烟驱走硅和氟,最后用盐酸溶解盐类,选择Al(396.152nm)、Ca(315.887nm)作为分析谱线,电感耦合等离子体原子发射光谱(ICP-AES)法测定硅锆合金中的铝和钙。研究了锆离子(0.3mg/mL)和铁离子(0.2mg/mL)共存体系中基体效应和光谱干扰对待测元素测定的影响。结果表明,该质量浓度的锆离子和铁离子对待测元素的测定结果不产生影响。铝和钙的质量浓度在10~50μg/mL,其线性相关系数均不小于0.999,方法中铝和钙的检出限分别为0.009μg/mL和0.006μg/mL。按照实验方法测定硅锆合金中的铝和钙,结果的相对标准偏差(RSD,n=10)分别为0.85%和1.4%。方法适用,结果令人满意。     

电感耦合等离子体原子发射光谱法测定镁钪合金中钪

提出了采用电感耦合等离子体原子发射光谱法测定镁钪合金中钪的含量。以盐酸（1＋1）溶液和过氧化氢溶解样品,选择波长为361.384nm的谱线作为钪的分析线。钪的发射强度与其质量浓度在20.00mg·L~（-1）以内呈线性关系,方法的检出限（3s）为2.9×10~（-1）mg·L~（-1）。方法用于镁钪合金样品分析,加标回...     

电感耦合等离子体原子发射光谱(ICP-AES)法测定铅锌精矿中铊

采用HCl-HNO_3-HF-HClO_4四种酸溶解铅锌精矿样品,稀释后用电感耦合等离子体原子发射光谱(ICP-AES)法测定其中的铊元素,测定范围0.005%~0.05%。实验确定了介质酸浓度、干扰元素的校正方法。方法相对标准偏差(n=7)为1.3%~4.8%,加标回收率为93.7%~102%,方法干扰少、快速、结果准确,适用于大批量铅锌精矿样品中铊的测定。     

电感耦合等离子体发射光谱法测定石灰中二氧化硅和磷含量的研究

以ICP-AES法测定石灰中二氧化硅和磷含量,确定了检测方法,通过试验对仪器进行优化,确定分析谱线、称样量等,采用标准溶液绘制校准曲线,通过标准样品验证,回收率在101-113%,相对标准偏差为0.004-0.0055%（n=5）。     

电感耦合等离子体原子发射光谱法（ICP-AES）测定RoHS指令聚合物中的铅和镉

本文引入微波技术消解聚合物塑料样品,使用电感耦合等离子体原子发射光谱仪（ICP-AES）测定聚合物中的铅（Pb）和镉（Cd）含量,并建立了优化的样品消解程序和测定方法,得到满意的测定结果。[摘要应包括目的、方法、结果、结论,请修改,同时修改英文]该方法具有效率高、污染小的优点。检测结果具有良好的精密度。     

湿法消解-电感耦合等离子体原子发射光谱（ICP-AES）法测定水凝胶中Mg的含量

为了准确测定水凝胶样品中的金属元素含量,本文以Mg元素为例,建立了湿法消解-电感耦合等离子体原子发射光谱法（ICP-AES）测定水凝胶中Mg绝对含量的方法。采用ICP-AES,以279.078谱线为分析线,RF功率：1.1 kW;积分时间：5 s;雾化器压力：0.4 MPa;冷却气：20.0 L/min;蠕动泵泵速：30 r/min;等离子体气流量：10.0 L/min;积分时间：5 s;采样3次。对比了硝酸及硝酸-高氯酸湿法消解以及硝酸-微波消解法对于样品消解程度的不同。结果表明：在110℃硝酸消解2 h 与硝酸-高氯酸（1:1）以及硝酸-微波消解得到的溶液相比,Mg含量几乎没有明显差别。在选定条件下,方法的日内和日间精密度良好,相对标准偏差（RSD,n=3）分别为0.38%和1.25%;加标回收率为97.57%～98.23%。该方法准确、适用、可靠,适用于水凝胶中Mg的绝对含量测定,可为水凝胶中金属元素的定量分析提供一种借鉴。     

电感耦合等离子体质谱法测定黄沙土壤中铅同位素比

用电感耦合等离子体质谱法（ＩＣＰ—ＭＳ）测定了５个黄沙原土样品中铅同位素比２０７Ｐｂ／２０６Ｐｂ、２０８Ｐｂ／２０６Ｐｂ,样品来自被认为是黄沙气溶胶源地区,为了使铅同位素测量中质量偏差和漂移减至最少,在样品中加入了铊标准溶液,测量２０５Ｔｌ／２０３Ｔｌ比,校正质量数差别选择的影响．同时,采用ＩＣＰ—ＭＳ和电感耦合等离子体原子发射光谱法（ＩＣＰ一ＡｌＳ）测定了随粒径变化样品中１２种元素浓度的变化．     

Determination of rhodium: Since the origins until today: ICP-OES and ICP-MS

Rh is contained in catalyst in much smaller quantities than Pt. For this reason, the database for this metal with respect to emissions from catalytic converters is much smaller than that for platinum, thus precluding a quantitative risk assessment.Accurate determinations of the rhodium have always been difficult tasks. The metal is often present at trace levels in sample types of complex composition. This situation has improved recently due to developments of instrumental methods and their applications to analyses of rhodium in a variety of matrices. The purpose of this review is to describe the analytical sensitive methods by inductively coupled plasma spectrometry.     

ICP-AES 法测定硅铁中痕量元素

采用电感耦合等离子原子发射光谱法测定硅铁中的痕量元素,研究了 Fe 基体对被测元素的影响,并选择了最佳工作条件.被测元素的检测限为 0 .60～76.2 ng/mL,样品加标回收率为 92%～108%,RSD(n=8)<3%.     

Hair analysis and the early detection of imbalances in trace elements for members of expeditions in Antarctica

In the framework of the Human Biology and Medicine Project of the National Program for Research in Antarctica (Programma Nazionale di Ricerche in Antartide, PNRA) a study was undertaken to explore the suitability of trace element determination in human hair as a tool for the early detection of the impact of extreme environmental conditions on the health of members of the Italian and French expeditions. This study included three campaigns, namely, the 1995–1996 expedition to the Italian base of Terra Nova Bay, as well as the 1997–1998 and 1998–1999 expeditions to both the Italian base of Terra Nova Bay and the Italian–French base of Dome C. Sampling of hair of participants in the expeditions was carried out both prior to departure and at the end of the period spent at the bases. As regards storage, pre-treatment and analysis of hair samples they were performed in accordance with previously established procedures. Acid-assisted microwave digestion was adopted as the best approach for preparing solutions for subsequent analysis by inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry. In the first part of this study, only the elements Ca, Cu, Fe, Mg and Zn were selected, while at a later stage it was decided to also include Co, Cr, Mn, Mo and Ni. Experimental results were subjected to basic statistical analysis to detect possible significant differences in element concentrations that occurred during the sojourn at the bases, with a view to identify possible remedial action to minimize adverse consequences.     

A pilot study on the feasibility of the preparation of a new certified reference material based on the Antarctic Scallop Adamussium Colbecki

As foreseen by the Italian National Programme of Research in Antarctica, a preliminary investigation was performed to ascertain the feasibility of the production of a new Certified Reference Material for trace elements based on the bivalve Adamussium colbecki. The scallops sampled in Antarctica during the 1999–2000 Italian scientific expedition were analyzed by inductively coupled plasma atomic emission spectrometry and high-resolution inductively coupled plasma mass spectrometry for their content in selected trace elements (As, Cd, Cr, Cu, Fe, Hg, Mn, Mo, Ni, V and Zn). The certification campaign will be undertaken on the basis of the findings of this feasibility study in close cooperation with the Institute for Reference Materials and Measurements, Joint Research Centre of the European Commission.     

Application of wavelet transform to background correction in inductively coupled plasma atomic emission spectrometry

A background correction method based on wavelet transform was devised and applied to inductively coupled plasma atomic emission spectrometry (ICP-AES). The proposed approach separated background from analyte signal according to their different frequencies. Compared with the analyte signal, the background has a low frequency. By removal of the components attributed to the signal, the background over the spectral window of the analyte line can be fitted through wavelet reconstruction. The results showed that the wavelet transform technique could handle all kinds of background and low signal-to-background ratio spectra, and required no prior knowledge about the sample composition, no selection of suitable background correction points, and no mathematical assumption of the background distribution. This technique performed as well as the conventional three-point background correction method for linear backgrounds, and provided better results than the latter for curved backgrounds. The proposed procedure was illustrated, by processing real spectra, to be an effective and practical tool for background correction in ICP-AES.