A kind of method that utilizes icp-aes to measure impurity metal element in oil sample
An ICP-AES and metal element technology, applied in the field of analytical chemistry, can solve the problems of ICP plasma instability, lower ICP-AES analysis performance, flameout, etc., and achieve simple pretreatment equipment, less reagent consumption, and high recovery rate Effect
Active Publication Date: 2016-04-13
JIANGSU SKYRAY INSTR
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Problems solved by technology
Injection of organic samples can easily lead to instability of ICP plasma, or even complete flameout, and the formation of carbon particles at the torch nozzle, which reduces the analytical performance of ICP-AES
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[0021] Embodiments of the present invention are described in detail below. It should be understood that the embodiments described below are exemplary and are only used for explaining the present invention, but should not be construed as limiting the present invention.
[0022] It should be noted that, in order to evaluate the feasibility and test accuracy of the method of the present invention, in the following description, "sample" refers to the mixed solution obtained by adding a predetermined amount of impurity metal elements to lubricating oil, and "sample blank" refers to For the nitric acid-petroleum ether system, the "standard solution" refers to the mixed solution obtained by adding a predetermined amount of impurity elements to the nitric acid solution, and the "standard blank" is the nitric acid solution.
[0023] The method for using ICP-AES to measure impurity metal elements in a grease sample according to an embodiment of the present invention comprises the follow...
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Abstract
The invention disclosed a method for measuring impurity metallic elements in an oil sample by using an ICP-AES (inductively coupled plasma-atomic emission spectrometry). The method comprises the following steps of: a) carrying out extraction separation on the oil sample by using a nitric acid-petroleum ether system to obtain a nitric acid fraction and a petroleum ether fraction; and b) measuring the strength of the impurity metallic elements in the nitric acid fraction by using the ICP-AES to compute the content of the impurity elements. According to the method for measuring the impurity metallic elements in the oil sample by using the ICP-AES in the embodiments of the invention, the defects such as the matrix effect of an organic sample-introducing organic solvent, the carbon deposition in a torch tube, and the need of auxiliary air sources in the process of pretreatment when the oil sample is analyzed by using an ICP-AES method can be remedied. Compared with other inorganic treatment methods, the method has the characteristics of being simple to operate, small in the use level of reagents, free from waste gas pollution, simple in pretreatment equipment, exact and reliable in results, and high in recovery rate.
Description
technical field [0001] The invention belongs to the field of analytical chemistry, in particular to a method for measuring impurity metal elements in oil samples by using ICP-AES. Background technique [0002] Commonly used methods for the determination of trace elements in oil samples include atomic absorption spectrometry, X-ray fluorescence spectrometry, and ultraviolet-visible spectrophotometry. With the development and maturity of atomic emission spectrometry, the ICP-AES method has been widely used in the elemental analysis of oil samples due to its characteristics of simultaneous determination of multiple elements, wide linear range, high sensitivity, small matrix effect, good precision, and fast accuracy. application. [0003] ICP-AES method analysis oil sample pretreatment method can be divided into inorganic treatment method and organic sampling method. Inorganic treatment methods generally process samples into inorganic aqueous solutions through ashing or digest...
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IPC IPC(8): G01N21/73G01N1/34
Inventor 郑建明艾明余正东吴敏
Owner JIANGSU SKYRAY INSTR