Atomic fluorescence spectroscopic spectrometry analysis method and device for on-line pre-reduction of trivalent arsenic and pentavalent arsenic

A technique of atomic fluorescence spectroscopy and speciation analysis, applied in the field of speciation analysis of trivalent arsenic and pentavalent arsenic in seawater, can solve the problems of pentavalent arsenic interference and influence on practical application, achieve process dynamic control, reduce samples and related reagents The effect of consumption and reducing experimental error

Inactive Publication Date: 2011-11-30
SHANGHAI SPECTRUM INSTR
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Problems solved by technology

However, since the reaction system of hydride generation atomic fluorescence spectrometry requires a certain acidity to meet the requirements of forming an argon hydrog...

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  • Atomic fluorescence spectroscopic spectrometry analysis method and device for on-line pre-reduction of trivalent arsenic and pentavalent arsenic
  • Atomic fluorescence spectroscopic spectrometry analysis method and device for on-line pre-reduction of trivalent arsenic and pentavalent arsenic
  • Atomic fluorescence spectroscopic spectrometry analysis method and device for on-line pre-reduction of trivalent arsenic and pentavalent arsenic

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Embodiment Construction

[0035] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the implementation of the present invention will be further described below in conjunction with specific illustrations.

[0036] figure 2 It is a relationship diagram among various systems in the online pre-reduction atomic fluorescence spectroscopic spectrometry device of trivalent arsenic and pentavalent arsenic of the present invention, the device includes a thermostat for constant temperature control of the solution in the solution mixing test tube A water bath mixing system 23, the constant temperature water bath mixing system 23 includes a solution mixing test tube and a heating device for heating the solution mixing test tube; a sequential injection hydrogenation for the hydrogenation reaction of the solution introduced by sequential injection to generate hydride gas Generating system 17; an atomic fluorescence spectrum detection syste...

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Abstract

The invention provides a method of an atomic fluorescence spectrometry shape analysis by on-line pre-reducing trivalent arsonium and quinquivalent arsonium, the method comprises the following steps: (a) mixing a first arsenical sample and a first reducing agent under the temperature of 65-75 DEG C and performing a reduction of quinquivalent arsonium; (b) mixing a second arsenical sample and a second reducing agent, and determining the concentration of trivalent arsonium by the generated hydride after mixing; (c) mixing a solution obtained by reducing quinquivalent arsonium in the step (a) with the second reducing agent, and determining the concentration of total arsonium by the generated hydride after mixing. The invention also discloses an apparatus for using the method. According to theon-line pre-reduction of quinquivalent arsonium, the method of the invention is capable of effectively solving the interference problem between the valences, avoiding manual pre-treating processes inthe off-line reduction and realizing an automatic and rapid analysis of arsenic shape.

Description

Technical field: [0001] The present invention relates to the field of spectroscopic analysis of elements by fluorescence spectrum, in particular to a method and device for speciation analysis of trivalent arsenic and pentavalent arsenic in seawater, which uses an online pre-reduction method of pentavalent arsenic to realize the quantification of trivalent arsenic and pentavalent arsenic analyze. Background technique: [0002] my country is a large maritime country with a large population and scarce land resources, but has an exclusive area of ​​more than 3 million square kilometers. Seawater is a very precious and limited natural resource. At present, with the rapid social and economic development in coastal areas, marine engineering construction and marine development activities are becoming more and more frequent. A large amount of industrial wastewater and domestic sewage are discharged into the sea through channels such as rivers, direct sewage outlets of enterprises, a...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N1/38
Inventor 陈建钢刘志高徐芳边静李玲辉
Owner SHANGHAI SPECTRUM INSTR
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