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Spray chamber, sampling system and ICP-MS using spray chamber

A technology of ICP-MS and sampling system, which is applied in the direction of material analysis, instruments, and measuring devices through electromagnetic means, and can solve problems such as low atomization transmission efficiency, limited instrument detection sensitivity, and large dead volume in the atomization chamber. Achieve the effect of eliminating memory effect, light weight and improving transmission efficiency

Active Publication Date: 2016-09-07
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the Scott dual-channel cylindrical spray chamber is commonly used in the sampling system of ICP-MS. However, the spray transmission efficiency of this spray chamber is low, and only 1% to 2% of the aerosol can be transmitted to the plasma in the end. , and about 98% to 99% of the sample solution is discharged as waste liquid, and the dead volume of the entire spray chamber is large, which limits the detection sensitivity of the instrument

Method used

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  • Spray chamber, sampling system and ICP-MS using spray chamber
  • Spray chamber, sampling system and ICP-MS using spray chamber
  • Spray chamber, sampling system and ICP-MS using spray chamber

Examples

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Effect test

Embodiment 1

[0028] Taking a series of silver standard solutions with different concentrations as an example, the standard dual-channel spray chamber of Agilent 8800 and this spray chamber were used to detect them, and the detection sensitivity was compared.

[0029] The prepared silver standard solution concentration is 0, 1, 2, 5, 10, 20, 50ng mL -1 . The instrument used is Agilent 8800ICP / MS / MS inductively coupled plasma tandem mass spectrometer, the sampling device is the lift pump that comes with the instrument itself, and the injection volume is 1mL min -1 . Use the Agilent 8800 standard dual-channel spray chamber, tune the ICP-MS to the best state, and then measure the series of silver standard solutions; then use the spray chamber of the present invention to tune the instrument, and measure the series under the optimal measurement conditions after tuning. Silver standard solution. Measurement results such as figure 2 As shown, a in the figure is the result of measurement using...

Embodiment 2

[0031] At low concentrations (20ng L -1 ) and different low flow rates (injection volume 0-100 μ l / min), use Agilent 8800 standard dual-channel spray chamber and spray chamber of the present invention to detect the series of silver standard solutions of different concentrations, and detect Sensitivity was compared.

[0032] The prepared silver standard solution concentration is 20ng L -1 . The instrument used was an Agilent 8800ICP / MS / MS inductively coupled plasma mass spectrometer, the sampling device was an external syringe pump and a 250 μL injection needle, and a capillary with a diameter of 75 μm was used for sampling. Control the injection volume by adjusting the syringe pump to 5, 10, 20, 50, 100 μL min -1. First use the dual-channel spray chamber of Agilent 8800 standard configuration, tune the ICP-MS to the best state, and measure the silver standard solutions of different injection volumes; then use the spray chamber of the present invention, under the optimal me...

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PUM

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Abstract

The invention provides a spray chamber used for a sampling system of an inductively coupled plasma massspectrometry (ICP-MS), the sampling system using the spray chamber, and ICP-MS using the spray chamber. The 3D printing technology is used, ABS plastic is used as the material, and the whole consumption type spray chamber used for the sampling system of ICP-MS is designed. The spray chamber is prepared by sleeving two concentric cylinders, can be used for separating and detecting silver ionic with different concentration, and can promote separation and detection used for nano-particle and other metal ionic. The sampling efficiency of the spray chamber is better than that of the common commercial two-channel cylindric spray chamber, and the spray chamber has low cost, simple manufacture process, stable signal, high throughput, and high detection sensitivity, and has possible of continuous optimization.

Description

technical field [0001] The invention belongs to the technical field of chemical detection and analysis, and more particularly relates to a spray chamber used for an inductively coupled plasma mass spectrometer (ICP-MS) sampling system, a sampling system using the same and the ICP-MS. Background technique [0002] Inductively coupled plasma mass spectrometry is an inorganic multi-element analysis technology that uses inductively coupled plasma as the ion source and is detected by a mass spectrometer. It is mainly composed of a sample introduction system, ion source, interface part, ion focusing system, mass analyzer, and detection system. It consists of several parts. Since its inception, ICP-MS technology has been continuously improved and perfected, and has rapidly developed into a highly appraised elemental analysis technology widely used in various fields, and has achieved a large number of research results. This technology has the advantages of high sensitivity, low det...

Claims

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Application Information

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IPC IPC(8): G01N27/62G01N35/10G01N27/626
CPCG01N27/62G01N35/10
Inventor 胡立刚王丁一严雪婷何滨江桂斌
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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