Standard gaseous formaldehyde dynamic contamination device

A gaseous formaldehyde and dynamic technology, applied in the field of standard gaseous dynamic poisoning experimental devices, can solve the problems of unstable formaldehyde concentration, inability to truly reflect the biological toxicity of formaldehyde, and difficult detection, and achieve accurate and constant poisoning dose and simple experimental methods Easy to implement and reproducible results

Inactive Publication Date: 2009-10-14
HUAZHONG NORMAL UNIV
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Problems solved by technology

Traditional poisoning devices use formaldehyde static poisoning, the environmental indicators are not easy to control and the concentration of formaldehyde is unstable and difficult to detect
In addition, formaldehyde vapor is used for liquid bath exposure, and the humidity is high, so that formaldehyde is absorbed in the nasal cavity, and it is difficult to enter the lungs and other tissues and organs of the body, which cannot truly reflect the biological toxicity of formaldehyde

Method used

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  • Standard gaseous formaldehyde dynamic contamination device
  • Standard gaseous formaldehyde dynamic contamination device

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Embodiment 1

[0020] Standard gaseous formaldehyde dynamic poisoning device such as figure 1 Shown: It is composed of environmental climate chamber I, formaldehyde analyzer II and 8.4-liter ventilated glass poisoning tank III. A 1.5 pg two-way air conditioner is installed in the laboratory, and the indoor temperature is preliminarily controlled within the range of 20-30°C. The environmental climate chamber is a WH-2 small environmental climate chamber, and its internal structure is as follows: figure 2 shown. Air compressor 1, dehumidifier 2, shunt rotameter 3, color-changing silicone tube 4, oxidant tube 5 and activated carbon tube 6 form a clean air generation system. The air for the clean air generation system comes from the outside, is connected to an oil-free air compressor by a conduit, and then uses a "filter pressure reducing valve" for preliminary dehumidification. Air pressure is controlled by a split rotameter 3 . Two drying tubes (built-in color-changing silica gel) further...

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Abstract

A standard gaseous formaldehyde dynamic poisoning device. The invention belongs to the technical field of standard gas dynamic poisoning. The device consists of an environmental climate chamber (I), a formaldehyde analyzer (II) and an 8.4-liter ventilated glass poisoning tank (III). Its main feature is that the environmental climate chamber is used as the source generator, the standard formaldehyde solution produced by Sigma is used, and the standard gaseous formaldehyde of the concentration required for the experiment is generated through the humidity control system of the environmental climate chamber, and the standard gaseous formaldehyde is poisoned on biological samples. It also conducts real-time dynamic and accurate detection of gaseous formaldehyde to ensure the stability of the state and concentration of gaseous formaldehyde. It overcomes the shortcomings of traditional static poisoning methods that are difficult to quantify and unstable. It is a reliable gaseous formaldehyde poisoning device.

Description

technical field [0001] The invention relates to a standard gaseous dynamic poisoning experiment device. Background technique [0002] Formaldehyde (formaldehyde, FA) is a common decoration chemical indoor air pollutant. Colorless, strong smelling, irritating gas with strong oxidative power, highly volatile, easily soluble in water, its 30% to 40% aqueous solution is called formalin. Indoor air formaldehyde pollution mainly has the following characteristics: (1) wide range of pollution; (2) long time of pollution; (3) high pollution concentration; (4) high biological toxicity; (5) molecular mechanism of toxicity is unclear. In recent years, the research on indoor air formaldehyde pollution and human health effects has become increasingly extensive and in-depth. The establishment of a standard gaseous formaldehyde dynamic exposure device is an important means to study the toxic effects of gaseous formaldehyde. Traditional poisoning devices use formaldehyde static poisoning,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00A61D99/00
Inventor 乔永康严彦丁书茂袁均林杨旭
Owner HUAZHONG NORMAL UNIV
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