Detection method of boric acid and/or borate

A detection method and borate technology, applied in the field of chemical analysis, can solve the problems of cumbersome processing, drying, heating, etc., and achieve the effects of simple and convenient operation, easy results, and short use time

Pending Publication Date: 2021-10-19
广东省药品检验所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curcumin chromogenic method is easy to operate, has good sensitivity and characteristics, and is suitable for rapid screening of boric acid and borate, but there are also problems such as cumbersome sample pretreatment, heating and drying in the process, etc., for solid cosmetics Rapid screening method for boric acid or borate in medium, room for further improvement

Method used

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  • Detection method of boric acid and/or borate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 5 g of dry hydrogen chloride and dissolve in 100 g of anhydrous methanol to obtain reagent A with a mass concentration of 5%.

[0033] Take 20 mg of 1 mg / g boric acid sample into a test tube, add 2 drops of reagent A dropwise, and shake to obtain a mixture. Pipette 1 drop of the mixture onto one end of the turmeric test paper, and at the same time add 1 drop of reagent A to the other end of the turmeric test paper as a blank. Immediately after adding the mixture, the turmeric test paper presents as figure 1 The results shown.

[0034] from figure 1 It can be seen that the turmeric test paper did not appear red after the reagent A was added dropwise, but the turmeric test paper immediately appeared light red after the mixture was added dropwise, indicating that this detection method can quickly detect boric acid and determine whether boric acid is contained in the sample to be tested.

Embodiment 2

[0036] Take 2 g of dry hydrogen chloride and dissolve in 100 g of absolute ethanol to obtain reagent A with a mass concentration of 2%.

[0037] Take 40 mg of 10 mg / g boric acid sample into a test tube, add 3 drops of reagent A dropwise, and shake to obtain a mixture. Pipette 1 drop of the mixture onto one end of the turmeric test paper, and at the same time add 1 drop of reagent A to the other end of the turmeric test paper as a blank. Immediately after adding the mixture, the turmeric test paper presents as figure 1 The results shown.

[0038] from figure 1 It can be seen that the turmeric test paper did not appear red after the reagent A was added dropwise, but the turmeric test paper immediately appeared red after the mixture was added dropwise. Simultaneously compared with Example 1, the redness of this embodiment becomes darker, which should be related to the concentration of boric acid, reflecting that the detection method of the present invention can quickly compare...

Embodiment 3

[0040] Take 13 g of dry hydrogen chloride and dissolve in 100 g of anhydrous methanol to obtain reagent A with a mass concentration of 13%.

[0041] Take 80 mg of negative sample into a test tube, add 8 drops of reagent A dropwise, and shake to obtain a mixture. Pipette 1 drop of the mixture onto one end of the turmeric test paper, and at the same time add 1 drop of reagent A to the other end of the turmeric test paper as a blank. Immediately after adding the mixture, the turmeric test paper presents as figure 1 The results shown ( figure 1 Example 3-1).

[0042] In addition, 80 mg of 10 mg / g borate sample was taken into a test tube, 8 drops of reagent A were added dropwise, and the mixture was obtained by shaking. Pipette 1 drop of the mixture onto one end of the turmeric test paper, and at the same time add 1 drop of reagent A to the other end of the turmeric test paper as a blank. Immediately after adding the mixture, the turmeric test paper presents as figure 1 The re...

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Abstract

The invention discloses a detection method of boric acid and / or borate, which comprises the following steps of dissolving anhydrous acid in an anhydrous protonation solvent 1 to form a reagent A, dissolving curcumin in an anhydrous protonation solvent 2, immersing filter paper, taking out and drying to obtain turmeric test paper, mixing a sample to be detected with the reagent A to obtain a mixture, dropwise adding the mixture onto the turmeric test paper, and qualitatively detecting boric acid and / or borate according to the color change of the turmeric test paper. The detection method disclosed by the invention is simple and convenient to operate, short in time consumption, easy in result judgment, good in characteristic property, free of other equipment and conditions, suitable for field operation and capable of meeting the field rapid detection requirements of supervision departments, detection institutions, individuals and the like, and heating or drying and other operations are not needed in the developing process.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a method for detecting boric acid and / or borate. Background technique [0002] Boronic acid, chemical formula H 3 BO 3 , is white powdery crystal or triclinic scale-like shiny crystal; borate is a general term for salts related to diboron trioxide, usually only refers to the salt of orthoboric acid, and the more commonly used borates include sodium tetraborate, commonly known as borax. Boric acid and borates are often used as external bactericides, disinfectants, astringents and preservatives, and can be used as antiseptic and bacteriostatic agents in cosmetics, and are often used in products such as talcum powder. [0003] Oral administration of boric acid and borates can cause acute poisoning, mainly manifested as gastrointestinal symptoms, such as nausea, vomiting, abdominal pain, diarrhea, etc., followed by dehydration, shock, coma or acute renal failure, high fe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/77
CPCG01N21/78G01N21/77G01N2021/7759
Inventor 吴震
Owner 广东省药品检验所
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