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Inductively Coupled Plasma Mass Spectrometry(ICP-MS) and Laser Ablation Techniques and Their Application in Solid Materials

Author: PanZuoJuan
Tutor: ZhengYueQing
School: Ningbo University
Course: Inorganic Chemistry
Keywords: Inductively Coupled Plasma Mass Spectrometry Laser ablation Solid materials Elemental analysis Low-alloy steel Plastic
CLC: O657.63
Type: Master's thesis
Year: 2009
Downloads: 243
Quote: 2
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Abstract


The solid material element analysis in the field of metallurgy, geology, environment, life sciences, nuclear industry, the semiconductor industry and other important position. Inductively coupled plasma mass spectrometry (ICP-MS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) in solid materials more and more attention. For some solid samples insoluble or digestion process is time-consuming, complex, easy introduction of pollution problems, generally need to select the appropriate pre-treatment methods before the solid material or injection technique is associated with a number of solid was determined by ICP-MS. Established method of high pressure digestion-ICP-MS method determination of a variety of low-alloy steel in boron, titanium, zirconium, niobium, tin, antimony, tantalum, tungsten, lead nine kinds of trace elements of high pressure digestion conditions to solve the The elements are difficult to dissolve completely or easily hydrolyzed or a low content of problem, and the construction method used for the analysis of samples of a variety of low-alloy steel. Research solution atomized injection on the basis of (SN)-ICP-MS, LA-ICP-MS method for the determination of the plastic lead, cadmium, chromium, mercury and other toxic elements in polypropylene standard material blanks for the calibration curve, direct analysis of the actual plastic samples. The method is simple sample handling, easy to operate and fast, reliable results to meet the day-to-day testing requirements. This research paper is divided into the following sections: the first chapter of the solid material element determination of the significance of its conventional analysis methods were introduced, respectively, discussed the principle and study conditions of the ICP-MS and LA-ICP-MS technology, On this basis, summed up the purpose, significance and main content of this thesis. The second chapter outlines the determination of significance on the basis of the low-alloy steel micro trace elements boron in high pressure digestion-ICP-MS method for the determination of low-alloy steel, titanium, zirconium, niobium, tin, antimony, tantalum, tungsten, lead nine trace elements. Emphasis on the impact of the high pressure digestion system and digestion conditions, resistant to hydrofluoric acid atomization system to optimize instrument parameters on the basis of study polyatomic ion interference and instrument drift, to determine the internal standard element investigated the effect of the matrix Finally, the method of analysis of the results are discussed. The third chapter begins with a brief introduction of the potential ability of traditional detection methods for toxic elements in plastic and plastic LA-ICP-MS analysis. Then highlight the laboratory to establish the LA-ICP-MS method for the determination of lead, cadmium, chromium, mercury in plastic process. Influence the behavior of both single point and line scan laser ablation way. The sensitivity of the method and the principle of stability, step by step to optimize the laser ablation process of laser power, pulse frequency, spot size, scan rate, defocusing distance RF power and ICP-MS, sample depth, and carrier gas flow parameters. According to calculations to fractionation factors visits fractionation effect, the results show that, in addition to smaller Hg outside the measuring element fractionation effects. From the method memory effect study found serious Hg memory effect in the plastic, and that mainly from the sample surface adsorption. Calibration curve, and polypropylene standard material blanks for PVC, PE standard material and PVC, ABS, PPS, PTFE and other plastic sample determination. Determined results by ICP-AES measurement value is basically consistent with the detection limit of Pb, Cd, Cr, Hg, respectively 0.002,0.001,0.08,1.5 mg / kg. The fourth chapter summarizes the work of the master's thesis, a summary of its inadequacies exist, the need for further research work prospects.

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CLC: > Mathematical sciences and chemical > Chemistry > Analytical Chemistry > Instrument analysis ( physics and physical chemistry ) > Mass Spectrometry
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