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Method for photometric analysis of trace pollutant in water sample and device thereof

A technology for photometric analysis and pollutants, applied in the field of photometric analysis, can solve the problems of difficult to meet the detection requirements of trace pollutants and low sensitivity, and achieve the effect of improving maintainability, improving sensitivity and simplifying the analysis process

Inactive Publication Date: 2010-07-14
FOCUSED PHOTONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the limited problem of low sensitivity and difficulty in meeting the requirements of trace pollutant analysis and detection in the prior art, the present invention provides a water quality trace pollutant analysis method with high sensitivity, good stability and high reliability, and also provides A water quality trace pollutant analysis device with high sensitivity, good stability, high reliability, good productivity and maintainability

Method used

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  • Method for photometric analysis of trace pollutant in water sample and device thereof
  • Method for photometric analysis of trace pollutant in water sample and device thereof
  • Method for photometric analysis of trace pollutant in water sample and device thereof

Examples

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Effect test

Embodiment 1

[0036] Such as figure 2 As shown, a photometric analysis device for trace phenol in surface water includes a syringe pump, a liquid storage unit, a multi-channel directional valve, a mixing-reaction unit, an enrichment column, and a photometric detection unit.

[0037] The multi-channel directional valve is provided with a common channel, a reagent channel, a water sample channel, a measurement channel, a reaction channel and an air channel, and the reagent channel is connected to reagent bottles such as buffer solution, potassium ferricyanide, and 4-aminoantipyrine. The common channel is connected to the liquid storage unit and the syringe pump, the measurement channel is connected to the enrichment column, and the reaction channel is connected to the mixing-reaction unit.

[0038] The enrichment column is packed with resin.

[0039] The photometric detection unit includes a light source, a detector and an analysis module for detecting the enriched reaction product in the e...

Embodiment 2

[0049] Such as image 3 As shown, a photometric analysis device for trace lead in surface water includes a multi-flow switching valve connected in sequence, a first peristaltic pump, a mixing-reaction unit, a second peristaltic pump, an enrichment column, and a photometric detection unit.

[0050] The enrichment column is packed with gel.

[0051] The multi-flow channel switching valve is composed of multiple valves, which are respectively connected to water samples and various reagents (such as buffer solution and dithizone solution).

[0052] The photometric detection unit includes a light source, a detector and an analysis module for detecting the enriched reaction product in the enrichment column. The source and detector are on the same side of the enrichment column.

[0053] The present embodiment also discloses a method for photometric analysis of trace lead in surface water, comprising the following steps:

[0054] a. During analysis, the first peristaltic pump accur...

Embodiment 3

[0059] Such as Figure 4 Shown, a kind of photometric analysis device of trace mercury in surface water, and embodiment 1 difference is:

[0060] 1. The enrichment column is filled with PTFE microbeads.

[0061] 2. The syringe pump communicates with the liquid storage unit through a valve (such as a three-way valve), and the air channel is set on the valve. Air channels are no longer provided on the multi-channel directional valve.

[0062] 3. The reagents used were changed to: acetic acid-sodium acetate buffer solution, microemulsion solution, dibromo-o-nitroarsine, etc.

[0063] This embodiment also discloses a photometric analysis method for trace amounts of mercury in surface water, which is different from Example 1 in that:

[0064] 1. Due to the different pollutants measured, the reagents used were changed to: acetic acid-sodium acetate buffer solution, microemulsion solution, dibromo-o-nitroarsine, etc.

[0065] 2. In step a, after the syringe pump introduces the wa...

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Abstract

The invention discloses a method for photometric analysis of trace pollutants in a water sample, which comprises the following steps: a, guiding a quantified water sample to be tested and a reagent matched with pollutants to be tested into a reaction unit, thereby generating reaction products in the reaction unit through reaction of the water sample to be tested and the reagent; b, making the reaction solution with the reaction products flow through a concentration unit, so that the reaction products can be combined with a carrier in the concentration unit and can be concentrated on the carrier; c, detecting the concentration unit with a luminosity detection unit so as to obtain the content or concentration of the pollutants to be tested in the water sample. The invention also discloses an analysis device which can apply the analysis method. Moreover, the invention has the advantages of high measurement sensitivity, low requirements for the detection unit and the like.

Description

technical field [0001] The invention relates to water quality detection, in particular to a photometric analysis method and device capable of detecting trace pollutants in water samples. Background technique [0002] The photometric analysis method has the characteristics of high accuracy and good stability of the analysis results, and is widely used in the field of water quality analysis. The principle of photometric analysis is: under specific acid-base conditions, the chromogenic agent selectively reacts with the target detection substance to generate a reaction compound, and then conducts photometric detection, and finally obtains the concentration of the target detection substance in the original solution according to the absorbance of the reaction product or content. Such as ammonia nitrogen analysis, the standard "Determination of Ammonium in Water Quality Nessler's Reagent Colorimetric Method" (GB 7479-87) stipulates that under strong alkaline conditions, the ammoni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/01
Inventor 项光宏霍玉美王健
Owner FOCUSED PHOTONICS
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