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1.
Krzysztof Jankowski Anna Jerzak Anna Sernicka-Poluchowicz Ludwik Synoradzki 《Analytica chimica acta》2001,440(2):67-221
A method for multielement determination of major elements in polymer additives by microwave induced plasma atomic emission spectrometry (MIP-AES) has been elaborated. Microwave digestion with nitric acid was selected for sample preparation because of its speed and versatility. Sodium nitrate was added to the digestion mixture in order to reduce phosphorus losses. The precision obtained varied between 2 and 4.5% depending on the element determined. The accuracy of the method was studied by analyzing the Spex 5-element oil standard. The method was applied to a variety of commercial and in-house prepared compositions. 相似文献
2.
A method for the determination of sixteen elements (Al, As, Cd, Co, Cr, Cu, Fe, Hg, Mn, Mo, Ni, Pb, Se, Sn, V, Zn) in seafood
by dynamic reaction cell inductively coupled plasma mass spectrometry (ICP–DRC–MS) is presented. A preliminary study of polyatomic
interferences was carried out in relation to the chemical composition of marine organisms belonging to different taxa. Acid
effects and other matrix effects in marine organisms submitted to closed-vessel microwave digestion were investigated as well.
Ammonia was the reactive gas used in the DRC to remove polyatomic ions interfering with 27Al, 52Cr, 56Fe and 51V. Optimal conditions for the simultaneous determination of analytes were identified in order to develop a fast multielement
method. A suite of real samples (mussels and various fish species) were used during method development along with three certified
reference materials: BCR CRM 278R (mussel tissue), BCR CRM 422 (cod muscle) and DORM-2 (dogfish muscle). The proposed analytical
approach can be used in conjunction with suitable chemometric procedures to address quality and safety issues in aquaculture
and fisheries. As an example, a case study is described in which mussels from three farming sites in the Venice Lagoon were
distinguished by multivariate analysis of element fingerprints.
相似文献
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海底沉积物的ICP-AES分析 总被引:1,自引:0,他引:1
海底沉积物用硝酸-高氯酸-氢氟酸消解,然后用ICP-AES法同时测定常量和微量元素。研究了样品中基体元素对微量元素测定的光谱干扰,并采用干扰曲线斜率法进行干扰校正,分析批量海底沉积物样品获得满意结果。 相似文献
5.
Determination of impurities in highly pure platinum by inductively coupled plasma-atomic emission spectrometry 总被引:1,自引:0,他引:1
In this work, a cyclone spray chamber system is used in conjunction with an inductively coupled plasma-atomic emission spectrometer instead of the conventional Scott-type chamber system to reduce the lower limit of detection achieved by the instrument, and an internal standard element (Y) is introduced to eliminate the effects caused by the drift in the plasma background level. An ICP-AES method for the determination of 13 impurity elements in a highly pure platinum sample has been developed. In this method, it is not necessary either to add a platinum matrix to the calibration standard or to separate and concentrate the elements to be determined in the samples. The effect of the platinum matrix on the elements to be analyzed is corrected for by a background equivalent concentration subtraction method. The determination ranges of the method are as follows: 0.00010-0.0050% for Mg, Mn, Cu, Ag, Fe and Zn; 0.00030-0.015% for Au, Ir, Ni and Pb; 0.00050-0.025% for Rh and Al; and 0.00080-0.040% for Pd. The method is simple, rapid and accurate, and can be applied to the analysis of 99.9–99.995% pure platinum. 相似文献
6.
电感耦合等离子体发射光谱法测定铝合金中多元素 总被引:3,自引:0,他引:3
陶俊 《理化检验(化学分册)》2007,43(9):769-770
提出了用电感耦合等离子体发射光谱法(ICP-AES)同时测定铝合金中铜,镁,锰,铁,硅,锌的分析方法。经试验选择各元素的最佳光谱线和工作条件。试验结果表明:用此方法测定铝合金标准样品中铜、镁、锰、铁、硅、锌,方法的准确度和精密度符合GB/T 6987.6—1986的技术要求。 相似文献
7.
《Analytical letters》2012,45(1):27-37
Abstract A system is devised that automatically optimizes energy dispersive x-ray spectrometer settings for multielement determinations under compromise conditions using self-sustained search algorithms. As an objective function, the joint probability of detecting all elements was chosen. The current process is to date limited by the resolution of the commercially available automatic power supply employed. Typical optimization times needed for the entire procedure are on the order of 5 minutes for major constituents, with prolonged times for minor and trace elements as a result of increased counting time to obtain good counting statistics. 相似文献
8.
《Analytical letters》2012,45(7):1441-1450
ABSTRACT The solid phase extraction of trace amounts of some metal ions from their mixtures using cation exchanger Dowex 50Wx4, cellulose sorbent with phosphonic acid groups Cellex P, chelating resin Chelex 100 and SIO2-TPP sorbent which contains porphyrin ligand covalently attached to aminopropyl silica gel was investigated. With respect to multielement preconcentration Cellex P and Chelex 100 seem to be the best sorbents; the recovery test for Al, Be, Cd, Ni, Pb and Zn were > 90%. Additionally, Cellex P appeared to be suitable for enrichment of Co and Mn. Silica-TPP sorbent could be applied as a selective collector for Mo(VI) and V(IV). 相似文献
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Sandra Gil Margaretha T.C. de Loos-Vollebregt Carlos Bendicho 《Spectrochimica Acta Part B: Atomic Spectroscopy》2009
A headspace single-drop microextraction (HS-SDME) method has been developed in combination with electrothermal vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS) for the simultaneous determination of As, Sb, Bi, Pb, Sn and Hg in aqueous solutions. Vapor generation is carried out in a 40 mL volume closed-vial containing a solution with the target analytes in hydrochloric acid and potassium ferricyanide medium. Hydrides (As, Sb, Bi, Pb, Sn) and Hg vapor are trapped onto an aqueous single drop (3 µL volume) containing Pd(II), followed by the subsequent injection in the ETV. Experimental variables such as medium composition, sodium tetrahydroborate (III) volume and concentration, stirring rate, extraction time, sample volume, ascorbic acid concentration and palladium amount in the drop were fully optimized. The limits of detection (LOD) (3σ criterion) of the proposed method for As, Sb, Bi, Pb, Sn and Hg were 0.2, 0.04, 0.01, 0.07, 0.09 and 0.8 µg/L, respectively. Enrichment factors of 9, 85, 138, 130, 37 and 72 for As, Sb, Bi, Pb, Sn and Hg, respectively, were achieved in 210 s. The relative standard deviations (N = 5) ranged from 4 to 8%. The proposed HS-SDME-ETV-ICP-MS method has been applied for the determination of As, Sb, Bi, Pb, Sn and Hg in NWRI TM-28.3 certified reference material. 相似文献