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Integrated speciation and aggregate analysis atomic fluorescence sample feeding and pre-treating system

A total analysis and atomic fluorescence technology, applied in the field of integrated form and total analysis atomic fluorescence sampling and pretreatment system, can solve the problems of increasing instrument failure rate and production cost, increasing instrument production cost, and low degree of automation , to achieve the effect of easy manual or automatic control, solving the problem of injection volume difference, reducing volume and production cost

Active Publication Date: 2017-02-22
成都市食品药品检验研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when using HG-AFS for total analysis, peristaltic pump is usually used for sample injection, which has disadvantages such as poor injection accuracy, reproducibility and stability
Although the high-end HG-AFS instrument overcomes the above shortcomings by adopting the injection injection method, the failure rate and production cost of the instrument are correspondingly increased due to the complexity of the injection system
[0004] Since LC-HG-AFS uses two independent sample injection and pretreatment systems for total and speciation analysis, this not only increases the volume of the equipment, but also increases the production cost of the instrument
In addition, when switching between total and speciation analysis, it is often necessary to reconnect the pipelines of the sample injection and pretreatment systems, resulting in cumbersome and complicated operations and a low degree of automation

Method used

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  • Integrated speciation and aggregate analysis atomic fluorescence sample feeding and pre-treating system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: total element analysis

[0047] The process of total elemental analysis involves sample injection and determination. When the sample concentration exceeds the range of the standard curve, small volume sample injection and determination steps are also involved. by figure 1 The integrated speciation and total analysis atomic fluorescence sampling and pretreatment system shown in the figure can be used for total element determination, which can realize single-point calibration and high-concentration sample determination. Its working principle and process are as follows:

[0048] Sample injection step: the sample inlet 13, the reducing agent inlet 14 and the carrier inlet 15 are all pressed into the card slot of the peristaltic pump 16, and the multi-way valve A1, multi-way valve B2 and multi-way valve C3 are respectively in the image 3 (a), Figure 4 (a) and Figure 5 (b) Status. Start the peristaltic pump 16, and the sample enters the quantitative analy...

Embodiment 2

[0053] Embodiment 2: element speciation analysis

[0054] In the process of element speciation analysis, which involves sample injection and determination process, the multi-port valve A1 can not be used, port h of the ten-port valve is directly connected to the speciation analysis mobile phase inlet 10, and port i of the ten-port valve is directly connected to the speciation analysis pretreatment system , the port d of the ten-way valve is directly connected to the port d of the eight-way valve, forming figure 2 Simple all-in-one speciation and total analysis atomic fluorescence sampling and pretreatment system shown for elemental speciation determination. Of course, multi-way valve A1 can also be used. At this time, port a of the six-way valve is connected to port b, port c is connected to port d, port e is connected to port f, port i of the ten-way valve is connected to port f of the six-way valve port h of the ten-way valve is connected with port c of the six-way valve, ...

Embodiment 3

[0057] Example 3: Analysis of the total amount of elements in the traditional peristaltic pump sampling method

[0058] by figure 1 The integrated speciation and total amount analysis atomic fluorescence sampling and pretreatment system shown in the traditional peristaltic pump sampling method is used as an example to determine the total amount of elements. The eight-way valve is in the Figure 5 (b) state, the multi-way valve A1 and the multi-way valve B2 can be in any state, the sample inlet 13 is open, and the pump tube of the inlet port can be pressed into the slot of the peristaltic pump 16 or not. During the sample injection and measurement process, by controlling the start and stop of the peristaltic pump, the carrier inlet 15 switches between the sample solution and the carrier liquid. The working principle and process are as follows:

[0059] Multi-way valve A1 and multi-way valve B2 are respectively in image 3 (a) and Figure 4 (a) State: During the start and sto...

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Abstract

The invention relates to an integrated speciation and aggregate analysis atomic fluorescence sample feeding and pre-treating system comprising a multi-way valve A, a multi-way valve B and a multi-way valve C which are connected with one another. Two ports of the multi-way valve A are connected with a speciation analysis mobile phase inlet and a speciation analysis pre-treating system respectively, the multi-way valve B is connected with a sample feeding port, three ports of the multi-way port C are connected with a reductant inlet, the speciation analysis pre-treating system and a three-way joint B respectively, the three-way joint B is connected with a flow carrying inlet, the speciation analysis pre-treating system is connected with a speciation analysis pre-treating reagent inlet, and element aggregate analysis or element speciation analysis is performed by rotating the multi-way valve A, the multi-way valve B and the multi-way valve C for selection. One sample feeding and pre-treating system can be shared during element aggregate or speciation analysis, so that size and production cost of LC-HG-AFS equipment are reduced.

Description

technical field [0001] The invention relates to the technical field of liquid chromatography atomic fluorescence analysis instruments, in particular to an integrated form and total amount analysis atomic fluorescence sampling and pretreatment system. Background technique [0002] Hydride generation-atomic fluorescence spectrometer (HG-AFS) is widely used in the analysis of arsenic, selenium, mercury, antimony, tellurium and other elements in biological and environmental samples. The combination of liquid chromatography and HG-AFS (LC-HG-AFS) makes the simultaneous analysis of multiple elements and the speciation analysis of elements possible. [0003] It is worth noting that when HG-AFS is used for total elemental analysis and LC-HG-AFS is used for speciation analysis, there are large differences due to the amount of sample injected and the pretreatment method before atomic fluorescence detection ( For example, when performing total analysis, the sample injection volume is ...

Claims

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Application Information

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IPC IPC(8): G01N30/06G01N30/20G01N30/88
CPCG01N30/06G01N30/20G01N30/88
Inventor 王芹余晓平万渝平谯斌宗梁恒兴李及
Owner 成都市食品药品检验研究院
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