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Device and method for determining iron in water sample by sequential injection-fluorescence method

A technology of sequential injection and fluorescence method, which is applied in the field of analytical chemical detection, can solve problems affecting climate change, etc., and achieve the effects of easy automatic control, less human intervention, and simple and reliable system hardware

Inactive Publication Date: 2020-03-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some waters, iron even limits the growth of phytoplankton and limits the absorption of atmospheric CO by phytoplankton. 2 , thereby affecting global climate change

Method used

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  • Device and method for determining iron in water sample by sequential injection-fluorescence method

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Experimental program
Comparison scheme
Effect test

no. 1 example

[0026] First embodiment: Determination of iron in water samples preserved by acidification

[0027] The main measurement steps are as follows:

[0028] 1. The six-position selector valve (1) is placed at the P1 port, and a 400 μl sample is extracted by the syringe pump (3);

[0029] 2. The six-position selector valve (1) is placed at the P2 port, and 200 μl of fluorescent reagent is extracted by the syringe pump (3);

[0030] 3. The six-position selector valve (1) is placed at the P3 port, and 200 μl of surfactant is extracted by the syringe pump (3);

[0031] 4. Place the six-position selector valve (1) at the P4 port, reversely push the syringe pump (3), and inject the mixed solution into the detection pool;

[0032] 5. Connect the second two-position three-way valve (9) to a 70°C water bath, turn on the water pump (8), keep it for 15 minutes, and then turn off the water pump (8);

[0033] 6. Connect the second two-position three-way valve (9) to a 25°C water bath, turn o...

no. 2 example

[0036] Second embodiment: Determination of iron in raw water sample (water sample not acidified)

[0037] The main measurement steps are as follows:

[0038] 1. The six-position selector valve (1) is placed at the P1 port, and a 360 μl sample is extracted by the syringe pump (3);

[0039] 2. The six-position selector valve (1) is placed at the P5 port, and 40 μl of 0.1M hydrochloric acid is extracted by the syringe pump (3);

[0040] 3. The six-position selection valve (1) is placed at the P2 port, and 200 μl of fluorescent reagent is extracted by the syringe pump (3);

[0041] 4. The six-position selector valve (1) is placed at the P3 port, and 200 μl of surfactant is extracted by the syringe pump (3);

[0042] 5. Place the six-position selector valve (1) at the P4 port, reversely push the syringe pump (3), and inject the mixed solution into the detection pool;

[0043] 6. Connect the second two-position three-way valve (9) to a 70°C water bath, turn on the water pump (8),...

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Abstract

The invention discloses a device and method for determining iron in a water sample by a sequential injection-fluorescence method. The device comprises a six-position selection valve, a storage pipe, an injection pump, a first two-position three-way valve, a detection pool, a light source, a photoelectric detector, a water pump, a second two-position three-way valve, a water bath sleeve and a plastic box. One end of the storage pipe is connected with an inlet end of the six-position selection valve and the other end is connected with the injection pump through the first two-position three-way valve; the detection pool is connected with the six-position selection valve; the light source and the photoelectric detector are respectively connected with the detection pool through optical fibers;and the detection pool is arranged in the water bath sleeve. A water inlet of the water pump is connected with a water outlet of the second two-position three-way water valve; a water outlet of the water pump is connected with a water inlet of the water bath sleeve; and two inlet ends of the second two-position three-way valve are respectively connected with water baths at temperatures of 70 DEG Cand 25 DEG C. The method has the beneficial effects that a sequential injection technology and a fluorescence analysis method are combined; system hardware is simple and reliable; the detection limitis low; the processes of mixing, reacting, determining and the like of samples and reagents are easily and automatically controlled; and human intervention is reduced.

Description

Technical field: [0001] The invention belongs to the field of analytical chemistry detection, and in particular relates to a device and method for determining iron in water samples by a sequential injection fluorescence method. Background technique: [0002] Iron is an essential element for many phytoplankton and microbial life processes, and plays an important role in intracellular respiration, photosynthesis and oxygen transfer. In some waters, iron even limits the growth of phytoplankton, and also limits the absorption of atmospheric CO by phytoplankton. 2 , thereby affecting global climate change. Therefore, the analysis of iron element has been paid great attention by people. [0003] Currently, methods for the determination of iron in water samples mainly include spectrophotometry, electrochemical analysis, atomic absorption, and fluorescence analysis. Compared with the flow injection technology, the sequential injection technology has less reagent consumption, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 王虎马骏周怀阳杨群慧季福武闫巧洋刘美彤
Owner TONGJI UNIV
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