Formaldehyde fluorescence detector

A detector and light source technology, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problem of expensive instruments

Inactive Publication Date: 2013-03-13
JILIN INST OF CHEM TECH
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However, these new methods require advance

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  • Formaldehyde fluorescence detector

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Embodiment Construction

[0018] 1. Synthesis of quantum dots

[0019] Firstly, in 2mL of aqueous solution, an appropriate amount of sodium borohydride and 2.9mg of tellurium powder were mixed and reacted to prepare sodium tellurium hydride solution 1; 100mL of water was added to a three-necked flask, and cadmium chloride was added to adjust the pH to 11.4. In 100μL of mercaptopropionic acid Freshly prepared Solution 1 was added to this solution and heated in the presence of a stabilizer. At room temperature, using rhodamine 6G as a control, the quantum efficiency of the synthesized quantum dots was measured to be about 25%.

[0020] 2. The main components of the detector

[0021] (1) Peristaltic pump: Quantitatively introduce various solutions into the flow cell at a constant concentration and rate.

[0022] (2) Light source: only need to provide excitation light with an excitation wavelength of 365nm.

[0023] (3) Sample pool: 1cm×1cm×5cm four-sided light-transmitting, hollow quartz cuboid. There ...

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Abstract

Utilizing a linear relationship between concentration of formaldehyde and CdTe quantum dot fluorescence intensity, the invention provides, designs and develops a novel fluorescence detector for determination of formaldehyde content of water. The detector mainly comprises a peristaltic pump, a light source, a sample pool, a detector, and an output display, can realize fast and accurate detection of formaldehyde content of water, and has advantages of simple structure, low cost, small volume, low energy consumption, convenient operation, high sensitivity and wide detection range of detection.

Description

technical field [0001] The present invention proposes to design and develop a novel fluorescence detector for detecting the content of formaldehyde in water quality. Background technique [0002] Formaldehyde is a highly toxic substance. Formaldehyde ranks second on the priority list of toxic chemicals in my country. It is a recognized source of allergies and one of the potential strong mutagen. It is of great significance to the sensitive and accurate determination of formaldehyde. . Commonly used determination methods include spectrophotometry, electrochemical methods, chromatographic analysis methods, etc. However, these new methods require advanced instruments, which are relatively expensive. For some laboratories in economically backward areas, it is particularly important to establish a fast, simple and accurate determination method. The invention is simple in operation and reasonable in cost and is an ideal instrument for detecting formaldehyde content in water qual...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 金丽张建坡王悦红曹雪玲娄大伟
Owner JILIN INST OF CHEM TECH
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