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Solid sampling-non-dispersion atomic fluorescence photometer collocating device and analyzing method

A technique of atomic fluorescence spectrometry and solid sampling, applied in fluorescence/phosphorescence, material excitation analysis, preparation of test samples, etc. The effect of energy consumption

Active Publication Date: 2012-01-04
西安西北有色地质研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the complex sample pretreatment process of the existing chemical vapor generation-non-dispersive atomic fluorescence technique (CVG-NDAFS), the present invention provides a solid sample introduction-non-dispersive atomic fluorescence photometer combined device and analysis method

Method used

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  • Solid sampling-non-dispersion atomic fluorescence photometer collocating device and analyzing method
  • Solid sampling-non-dispersion atomic fluorescence photometer collocating device and analyzing method
  • Solid sampling-non-dispersion atomic fluorescence photometer collocating device and analyzing method

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Example 1: Analysis of Inorganic Matrix Samples such as Soil and Rocks

[0065] Standard sample analysis data, including 2 rock standard samples (GBW 07104 and GBW07113) and 1 soil standard sample (GBW 07402)

[0066] The first step is to weigh 0.1000g of the selected standard samples respectively, and add 0.200g of thermal release agent ammonium bromide to each sample, mix well and put them into the thermal release tube.

[0067] The second step is to heat and release at 800±50°C. The pyrolysis heating system chooses electric heating wire and liquefied gas-air flame respectively, and the liquefied gas uses a portable liquefied gas compression tank as the gas source.

[0068] The third step, with 5% (v / v) H 2 SO 4 + 1% (m / v) thiourea + 1% (m / v) ascorbic acid mixed solution 5mL is used as the absorption liquid to absorb the released analytical elements.

[0069] The fourth step, with 5% (v / v) H 2 SO 4 + 1% (m / v) thiourea + ascorbic acid mixed solution 5mL is used as...

Embodiment 2

[0080] Embodiment 2: Analysis of organic component samples such as food, plants, and biological samples

[0081] Select GBW10010 (rice), GBW07601 (human hair) and GBW07605 (tea).

[0082] The first step is to weigh 0.1000g of the selected standard samples and put them into the heat release tube.

[0083] The second step is to pass through the argon gas for dry distillation at 800±50°C, and then pass through the sample for dry ashing. During the ashing process, in order to prevent the volatilization loss of Hg, As, Sb and Se, follow-up Gold amalgam trap and absorber tube for absorption. Among them, the heating wire and the liquefied gas-air flame are respectively selected as the adding methods, and the portable liquefied gas compression tank is used as the gas source for the liquefied gas.

[0084] In the third step, 2 mL of a mixed solution of 1% (v / v) HCl + 1% (m / v) thiourea + ascorbic acid was used as the absorption liquid to absorb the released analytical elements.

[00...

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Abstract

The invention relates to a solid sampling-non-dispersion atomic fluorescence photometer collocating device and an analyzing method. The device comprises a solid sampler, an integrated interface, a sample pipe, a peristaltic pump, a tee joint, a gas-liquid separator, a detector and a computer. The method comprises the following steps of: volatilizing an analyzing element in a volatile halide way and absorbing by absorption liquid by adding an auxiliary heat release agent or an ashing auxiliary agent in the solid sampler. The absorption liquid is introduced into a chemical steam generating system for reacting with potassium borohydride (sodium); and the generated volatile hydride or atomic steam is carried into an instrument atomization area for being detected by atomic fluorescence. The invention directly adopts solid sampling, rapidly realizes the detection of toxic elements, such as arsenic, stibium, selenium, mercury, and the like in the samples, such as geology, environment, food, biology, and the like and has the advantages of higher analyzing speed, low analyzing cost, high detecting sensitivity, high device portability, environmental protection, and the like.

Description

technical field [0001] The invention belongs to optical, mechanical and electrical integration scientific analysis instruments and analysis methods, in particular to a solid sampling-non-dispersive atomic fluorescence photometer combined device and analysis method, the invention directly adopts solid-state sampling without resorting to traditional Solubilization sample pretreatment technology can quickly realize the determination of toxic elements such as arsenic, antimony, selenium, mercury and other elements in geological, environmental, food, biological and other samples. Background technique [0002] Sample preparation and introduction technology is an important part of the entire analysis process. With the rapid development of modern scientific instruments, although the final measurement technology has reached the level of high sensitivity, speed, and high resolution, the pretreatment and introduction technology of samples lag behind seriously , has become the "bottlene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N1/28
Inventor 李中玺杨晓明李日升李海涛吴随周
Owner 西安西北有色地质研究院有限公司
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