Method for detecting content of phosphorus element in grease by utilizing ICP organic sample injection

A technology for sample injection detection and phosphorus element, which is applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc. The effect of guiding production and shortening analysis and testing time

Pending Publication Date: 2021-06-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sample pretreatment process of this method is more complicated, and the sample digestion process in the early stage also takes a long time

Method used

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  • Method for detecting content of phosphorus element in grease by utilizing ICP organic sample injection
  • Method for detecting content of phosphorus element in grease by utilizing ICP organic sample injection
  • Method for detecting content of phosphorus element in grease by utilizing ICP organic sample injection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Accuracy test - small Tongzi fung oil and GB / T5537-2008 contrast

[0072] It is weighed 5 different small tung fur samples 2.5 g (accurate to 0.001 g) to 25 ml of sample bottles, and diluted 10 times and shakes with bioaine. The five samples were measured separately in the ICP for the standard curve, and the results of the national standard method were compared, and the deviation value was less than 5%, the average value was 2.27%, and the method of the present invention has a good car. Accuracy adaptability to meet measurement requirements. The specific results are as follows:

[0073] Table 1 Small Tongzi fung oil accuracy test results

[0074]

Embodiment 2

[0076] Accuracy test - Little Tongzi refined oil and GB / T5537-2008 contrast

[0077] 2.5g (accurate to 0.001 g) to 25 ml of sample bottles, diluted 10 times and shake well with bioaine. The 5 samples were measured in the ICP of the standard curve, and the analysis of the results of the national standard method was compared, and the deviation value was less than 5%, the average value was 3.33%, and the method of the present invention has good Accuracy adaptability to meet measurement requirements. The specific results are as follows:

[0078] Table 2 Small Tongzi refined oil accuracy test results

[0079]

Embodiment 3

[0081] Accuracy test - Palm oil and GB / T5537-2008 contrast

[0082] 5 different palm oil samples 2.5 g (accurate to 0.001 g) into a 25 ml sample bottle were weeded, and diluted 10 times and shakes with bioaine. The five samples were measured in the ICP for the standard curve, and the results of the results of the national standard method were compared, and the deviation value was less than 5%, the average value was 4.16%, and the method of the present invention has a good and accurate palm oil. Degree adaptability to meet the measurement requirements. The specific results are as follows:

[0083] Table 3 Palm oil accuracy test results

[0084]

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Abstract

The invention relates to a method for detecting the content of a phosphorus element in grease by utilizing ICP organic sample introduction. The method comprises the following steps of 1, setting working conditions of an inductively coupled plasma spectrometer, 2, preparing phosphorus standard solutions with a series of concentrations, 3, sequentially introducing the phosphorus standard solution in the step 2 into an inductively coupled plasma spectrometer for determination to obtain a corresponding relation between a spectral line signal value and the concentration of the phosphorus standard solution, 4, diluting the grease sample to be measured, and measuring to obtain a spectral line signal value of the grease sample to be measured, 5, obtaining the phosphorus concentration C of the grease sample to be measured according to the corresponding relation obtained in the step 3 and the spectral line signal value of the grease sample to be measured, and calculating the phosphorus content M in the grease sample to be measured by using a formula I. V is the volume of the diluted sample and m is the dosage of the sample. The method disclosed by the invention can be used for rapidly, simply, safely and accurately detecting the content of phosphorus / phospholipid in the grease.

Description

Technical field [0001] The present invention belongs to the field of grease analysis, which involves a method of detecting phosphorus phosphorus content in oil using ICP organic injection techniques. Background technique [0002] The phospholipid in the oil is a complex organic mixture composed of glycerol, fatty acids, phosphoric acid, amino alcohol and choline or choline. The oil seed contains more phospholipids, and phospholipids are easily transferred to the oil during the oil, and thus a large number of phospholipids are contained in the unprocessed oil. The phospholipin is a fat-soluble substance, which has a poor impact on the purification of grease: with hydrophilicity, which can increase the moisture of the oil, so that the hydrolysis and acid failure; has emulsion, a large amount of foam is generated during cooking; Oxidation, heat-reciprocating sequel, affecting the quality of the oil-fried food; the catalyst toxic to the hydrogenation reaction can cause hydrogenation ...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/38
CPCG01N21/73G01N1/38
Inventor 姜伟金书含杨晓彦赵仲阳贾云刚朱丽娜何玉莲季荣磊王磊赵光辉王伟众王东军张岩李影辉荣丽丽王东青
Owner PETROCHINA CO LTD
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