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Method for distinguishing pearl powders from shell powders

A technology of shell powder and pearl powder, which is applied in the field of biochemistry, can solve the problems of unusable identification, etc., and achieve the effect of rapid phenomenon and simple method

Inactive Publication Date: 2011-01-12
钱国英 +2
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Problems solved by technology

It was found that the samples of nacre and prismatic layers were carbonized at 600°C and 700°C respectively, and the organic matter contained in them was completely decomposed at 700°C and 800°C respectively, but the changes of prismatic layer and nacre powder tended to be consistent after being treated at this temperature, which could not For the identification of two powders

Method used

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  • Method for distinguishing pearl powders from shell powders
  • Method for distinguishing pearl powders from shell powders
  • Method for distinguishing pearl powders from shell powders

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Grind the pearls and clam shells treated with alkali separately, and pass through a 100-mesh sieve to make pearl powder and shell powder. Infrared spectra of pearl powder and shell powder such as figure 1 shown.

[0020] Take part of the pearl powder and shell powder to directly measure its infrared spectrum; the remaining part was heated and calcined at 400°C for 2 hours, put into a desiccator and cooled to room temperature to obtain the calcined sample powder. Weigh 0.001g of the sample powder of the calcined pearl powder and shell powder and grind and mix them with 0.1g potassium bromide respectively in an agate mortar, and then make transparent pearl powder flakes and shell powder flakes on a manual tablet machine Conduct infrared spectroscopy tests. The measurement conditions of the infrared spectrometer are as follows: resoluti...

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Abstract

The invention relates to a method for distinguishing pearl powders from shell powders, comprising the following steps: the pearl powders and the shell powders are calcined and then respectively mixed with potassium bromide to be made into transparent flakes, then the infrared spectrum of the transparent flakes is measured under the conditions of resolution of 4 cm<-1> and scanning for 16 times with the scanning range of 400-4000 cm <-1>, the pearl powders and the shell powders are distinguished according to the characteristic peak of 701.0 cm <-1>, 1082.1 cm <-1>, 2919.3 cm<-1> and 3468.5 cm <-1>; as organic substances in the calcined pearl powders are partially decomposed, the crystal type of calcium carbonate changes from the aragonite type to the calcite type, and the calcium carbonatestarts to decompose; the organic substances in the shell powders are almost totally decomposed, the aragonite type calcium carbonate is totally converted into the calcite type calcium carbonate, and the calcium carbonate does not start to decompose into calcium oxide yet, therefore, the method can be used for distinguishing the pearl powders from the shell powders. Compared with the prior distinguishing method, the method can simply, rapidly and effectively distinguish the pearl powders from the shell powders with obvious phenomenon.

Description

technical field [0001] The invention relates to the field of biochemistry, in particular to an infrared spectrum identification method for pearl powder and shell powder. Background technique [0002] Pearl powder is a white, off-white powder processed by natural pearls by physical methods. Studies have shown that pearl powder is rich in nutrients and life-source substances. Multifunctional. Just because pearl powder has so many effects, new products such as medicine, beauty treatment, and makeup using pearl powder as raw materials are constantly being developed, and the demand for pearl powder is increasing rapidly. Many unscrupulous businessmen also take the opportunity to adulterate to obtain higher profits. Therefore, it is of great practical significance to find an accurate and fast identification method of pearl powder. [0003] At present, talcum powder and shell powder are the most doped in pearl powder, especially shell powder. The current "Chinese Pharmacopoeia" ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/35G01N1/28G01N21/3563
Inventor 钱国英夏静芬陈亮
Owner 钱国英
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