On-line internal standard mixing system for element detection

Abstract

The invention discloses an on-line internal standard mixing system for element detection and belongs to the field of chemical analysis element detection. The provided on-line internal standard mixingsystem for element detection is simple in structure, low in cost and convenient to operate, and comprises a detection instrument, an internal standard correction element solution container and a sample-to-be-tested solution container. The system also comprises a concentric atomizer and peristaltic pumps. The concentric atomizer comprises a gas carrier port, a liquid inlet port and a nozzle port. Afirst pipeline and a second pipeline are provided with the peristaltic pumps respectively. The system does not need to additionally add and purchase a commercial special internal standard mixing device (mixer), and realizes the same function and effect as the commercial online internal standard mixing device (mixer) at the same time, that is, realizing online mixing of an internal standard correction element solution and a sample-to-be-tested solution. The system has the advantages of simple structure and convenient use and the like, reduces purchase cost and effectively reduces equipment cost.

Description

technical field [0001] The invention relates to the field of chemical analysis element detection, in particular to an on-line internal standard mixing system for element detection. Background technique [0002] Inductively coupled plasma atomic emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS) and other detection instruments are widely used in the detection and analysis of trace, trace and ultra-trace impurity elements in metallurgy, petrochemical, geological and mining , environmental protection, nuclear energy, medicine, food and other industries are developing rapidly. When using ICP-AES or ICP-MS to determine the content of element components in various samples, it is often necessary to take technical measures for internal standard correction. It is well known in the industry that the internal standard calibration method can effectively eliminate interference factors such as matrix effects and instrument drift, and can improve the...

AI Technical Summary

Problems solved by technology

The method of manually adding internal standard elements is in the form of manual operation, in the blank solution, working curve calibration solution and a large number of sample solutions to be tested, use a pipette or pipette gun to aliquot and add exactly the same volume of internal standard Correct the element solution and then stir it evenly to obtain a mixed solution, and then add the mixed solution to the detection instrument for detection; this kind of addition and mixing method is cumbersome to operate and requires high quality personnel, and any difference in the addition of internal standard elements in a solution will affect Accuracy of test results

However, the current online internal standard mixing needs to use a special online internal standard mixing device (device) to automatically inhale the internal standard correction element solution and the sample solution to be tested, and use the special mixing device to mix evenly, and then mix the mixed The mixed solution is transmitted into the detection instrument for measurement. The online internal standard mixing method completely overcomes the defects of manually adding internal standards. However, the current online internal standard mixing devices are all special independent product devices, which need to be purchased additionally. The value is thousands to tens of thousands of RMB, and the cost is very high

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