A kind of detection method of formic acid in ant products

A detection method and product technology

Active Publication Date: 2022-07-12
SHANXI PROVINCE FOOD & DRUG INSPECTION INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of the distillation method is complicated and the experiment takes a long time; the cost of the instrument for the ion chromatography test is high; although the gas chromatography method consumes less time than the distillation method and is cheaper than the ion chromatography instrument, there are the following problems: the used derivatizer is Ethanol, in which ethanol has a small molecular weight and a low boiling point, which leads to its early peaking time, is easily disturbed, is not easy to separate and detect, and has a great impact on the accuracy of the results

Method used

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  • A kind of detection method of formic acid in ant products
  • A kind of detection method of formic acid in ant products
  • A kind of detection method of formic acid in ant products

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Experimental program
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Embodiment 1

[0039] raw material:

[0040] Ant powder (the batch number of Shanxi Shengliyuan Biotechnology Co., Ltd. is LY-03-18-04, which was sieved with 40 mesh in advance), formic acid (chromatographically pure), isopropanol (chromatographically pure), concentrated sulfuric acid (almost anhydrous), p-toluenesulfonic acid (analytical grade).

[0041] Main instruments:

[0042] Gas chromatography mass spectrometer (with hydrogen flame detector, FID for short).

[0043] The test steps are as follows:

[0044] Preparation of reference solution:

[0045] Weigh 10 mg of formic acid (also known as formic acid) reference substance, and use isopropanol as a solvent to prepare a 1 mg / mL reference substance solution as a reference substance stock solution.

[0046] The gas chromatography conditions are: column: HP-INNOWAX (60m×0.250mm×0.5μm); temperature program: initial temperature 50°C, hold for 4min, rise to 180°C at a rate of 20°C / min, hold for 5min; carrier gas: Helium (purity ≥99.99%),...

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Abstract

The invention relates to the technical field of formic acid detection, and provides a detection method for formic acid in ant products. By selecting isopropanol as an extractant and a reactant to carry out an esterification reaction, the reaction is sufficient, and there is almost no interference between substances. Therefore, the accuracy of the test method is improved; at the same time, concentrated sulfuric acid and p-toluenesulfonic acid are used as the catalyst for the esterification reaction, which avoids the occurrence of side effects such as sulfonation, carbonization or polymerization due to the violent reaction when the concentrated sulfuric acid is used as the catalyst alone. The reaction occurs; the problem of poor selectivity of isopropyl formate and too slow reaction rate when single selection of p-toluenesulfonic acid is solved, through the coordinated use of the two, the reaction rate is moderate, and the transformation rate of the product isopropyl formate is simultaneously improved, This further improves the accuracy of the test results.

Description

technical field [0001] The invention relates to the technical field of formic acid detection, in particular to a detection method for formic acid in ant products. Background technique [0002] Ants are rich in formic acid (also known as formic acid, the molecular formula is HCOOH). Formic acid has a targeted anti-rheumatic factor and has a definite curative effect on rheumatism and rheumatoid arthritis, so ants are used as an important raw material. A variety of single or compound preparations of traditional Chinese medicine or health food are deeply loved by consumers. For the wide application of ants, the content of formic acid has also become one of the important indicators to measure the quality of ant products. [0003] At present, the detection methods of formic acid mainly include distillation, ion chromatography and gas chromatography. However, the preparation process of the distillation method is complicated, and the experiment takes a long time; the cost of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/067
Inventor 申国华梁卜文董培智王子龙杨国伟
Owner SHANXI PROVINCE FOOD & DRUG INSPECTION INST
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