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Novel colorimetric test pen

A colorimetric and new type of technology, applied in the direction of chemical reaction of materials and material analysis by observing the influence of chemical indicators, can solve problems such as insufficiency, achieve less waste, simple operation, no The effect of repair and maintenance

Inactive Publication Date: 2012-11-21
DALIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In some cases, the traditional central laboratory model cannot meet the needs of people's fast-paced life

Method used

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  • Novel colorimetric test pen
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Examples

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Embodiment 1

[0032] Taking the determination of sodium nitrite content in food as an example, the specific use method of the device of the invention is briefly described.

[0033] (1) Preparation of standard concentration color card

[0034] a) Production principle. Sodium nitrite is diazotized with p-aminobenzenesulfonic acid amide, and then reacts with naphthaleneethylenediamine hydrochloride to generate a purple-red compound. The color of sodium nitrite standard solution with different concentration gradients participating in the reaction is different (see reference for specific determination methods. Literature: Determination of nitrite content in food [J], Hebei Chemical Industry, 2010, 33 (3); 62-63).

[0035] b) Method of making. Accurately pipette 5 μg / mL NaNO 2 Operating solutions 0, 0.5, 1.0, 2.0, 3.0, 4.0, 5.0mL were placed in 25mL colorimetric tubes respectively, 4.5mL ammonium chloride buffer solution was added to the standard tube, 2.5mL 60% acetic acid was added, and 5.0m...

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Abstract

The invention discloses a novel colorimetric test pen, which is obtained by reconstructing and innovating based on common syringes in markets, is a liquid taking device adjusted by double pressures, and is designed for the first time according to the design principles of pH test paper, proceeding from the color reaction of objects under test. The test pen disclosed herein is a simple and convenient test pen for detection which combines sampling, releasing developer and color comparison as a whole. The test pen disclosed herein meets the requirements of people for instant detection, and is a popular, simple and portable testing arrangement.

Description

technical field [0001] The invention relates to the field of physical and chemical analysis instruments, in particular to a novel colorimetric test pen. Background technique [0002] With the development of society and the improvement of people's living standards, people require social health care institutions to provide laboratory tests. In addition to having large-scale equipment and more advanced test items, they should also go out of the laboratory and face the community. Families are facing rural areas, which requires improvements in testing equipment and experimental methods to make them more capable of on-site testing. For example, how to enable people who have not received professional training to detect whether the melamine content in ordinary milk powder exceeds the standard in a timely and rapid manner, all (such as home self-inspection) or part (such as color contrast). In some cases, the traditional central laboratory model cannot meet the needs of people's fas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 申贵隽张寒格王颖谢弘宇申远
Owner DALIAN UNIV
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