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Quick rongalite test paper and preparation method thereof

A technology of test paper and test paper, which is applied in the field of fast test paper and its preparation, can solve the problems of easy false positive, spilled reagents, inconvenience to carry, etc., and achieve scientific and reasonable test results, simple use and operation, and convenient carrying effect

Inactive Publication Date: 2019-03-08
云南商测质量检验技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing main methods for detection of white block (sodium formaldehyde sulfoxylate) are spectrophotometry. In recent years, rapid detection kits (tubes) have also been used in screening and detection. However, the steps of spectrophotometry are cumbersome and are not suitable for Law enforcement on-site rapid screening test
Most of the current detection kits only detect the formaldehyde decomposed in the hanging white block, while ignoring the sulfur dioxide in it, which leads to false positives easily. Moreover, the reagents in the kit are easy to spill and are not easy to carry

Method used

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  • Quick rongalite test paper and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A kind of method for preparing hanging white block speed test paper, comprises the steps:

[0032] Step 1: use hydrochloric acid or phosphoric acid to configure an acidic solution with a concentration of 1mol / L;

[0033] Step 2: Take chromatographic paper, filter paper or glass fiber paper, immerse in the acidic solution obtained in step 1, soak for 8 minutes, take it out, cut it into length: 6mm, width: 4mm test paper pieces after vacuum drying, and then get the acid test paper piece, put one end of it Paste on the substrate, the width of the substrate is consistent with the width of the acid test paper;

[0034] Step 3: Take filter paper or absorbent paper, cut the length: 6mm, width: 4mm test paper sheet, paste one end on the base sheet, and cover the acid test paper sheet at the other end;

[0035] Step 4: Take 0.1 pararosaniline hydrochloride, add a small amount of water and ethanol to grind in a mortar, dilute with water to 100ml, filter, and take the filtrate fo...

Embodiment 2

[0041] A kind of method for preparing hanging white block speed test paper, comprises the steps:

[0042] Step 1: use hydrochloric acid or phosphoric acid to configure an acidic solution with a concentration of 3mol / L;

[0043] Step 2: Take chromatographic paper, filter paper or glass fiber paper, immerse in the acidic solution obtained in step 1, soak for 8 minutes, take it out, cut it into length: 10mm, width: 4mm test paper pieces after vacuum drying, and then get the acid test paper piece, put one end of it Paste on the substrate, the width of the substrate is consistent with the width of the acid test paper;

[0044] Step 3: Take filter paper or absorbent paper, cut the length: 10mm, width: 4mm test paper sheet, paste one end on the base sheet, and cover the acid test paper sheet at the other end;

[0045] Step 4: Take 3g of pararosaniline hydrochloride, add a small amount of water and ethanol to grind in a mortar, dilute with water to 100ml, filter, and take the filtrat...

Embodiment 3

[0051] A kind of method for preparing hanging white block speed test paper, comprises the steps:

[0052] Step 1: use hydrochloric acid or phosphoric acid to configure an acidic solution with a concentration of 3mol / L;

[0053] Step 2: Take chromatographic paper, filter paper or glass fiber paper, immerse in the acidic solution obtained in step 1 for 15 minutes, take it out, cut it into test paper pieces with a length of 6 mm and a width of 8 mm after vacuum drying, and obtain acid test paper pieces. Paste on the substrate, the width of the substrate is consistent with the width of the acid test paper;

[0054] Step 3: Take filter paper or absorbent paper, cut the length: 6mm, width: 8mm test paper sheet, paste one end on the base sheet, and cover the acid test paper sheet at the other end;

[0055] Step 4: Take 3g of pararosaniline hydrochloride, add a small amount of water and ethanol to grind in a mortar, dilute with water to 100ml, filter, and take the filtrate for later ...

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Abstract

The invention discloses quick rongalite test paper which comprises a sample pad, a water addition area, an acid test paper piece, a developing piece and a base piece, wherein the sample pad is filterpaper or water absorption paper; the acid test paper piece is made after acid solution soaking and vacuum drying; the developing piece is made after soaking of a hydrochloric acid pararosaniline typereagent solution and vacuum drying; the base piece is a PVC thin piece or a plastic thin piece. The invention further discloses a preparation method of the quick rongalite test paper. The quick rongalite test paper disclosed by the invention is simple to make, low in cost, high in sensitivity, applicable to rapid detection on rongalite in foods, and applicable to rapid screening detection on rongalite in foods by law-enforcing departments.

Description

technical field [0001] The invention belongs to the technical field of rapid detection, and in particular relates to a hanging white block speed test paper and a preparation method thereof. Background technique [0002] Hangbaikuai (sodium formaldehyde sulfoxylate) is a substance that is easily soluble in water, and it starts to release toxic substances above 60°C, and it will release formaldehyde and sulfur dioxide and other substances at higher temperatures. The human body will cause some damage to the liver and kidney after ingestion, and even cause cancer or deformity in severe cases. Our country has explicitly banned the addition and use of food in relevant announcements, but due to its good anti-corrosion, freshness and color preservation effects, some food manufacturers are still illegally adding and using it. [0003] Existing main methods for detection of white block (sodium formaldehyde sulfoxylate) are spectrophotometry. In recent years, rapid detection kits (tub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 李鹏飞周从燕晏龙李莞琦刘玲何雪娇
Owner 云南商测质量检验技术服务有限公司
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