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Method for quantitatively discriminating true or false lily bulb powder

A technology of lily powder, true and false, applied in the field of identification of true and false lily powder, can solve the problems of high equipment requirements, high cost, complicated operation, etc., and achieve the effects of objective and obvious results, improved clarity, and low detection cost.

Inactive Publication Date: 2008-09-10
NANCHANG UNIV
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AI Technical Summary

Problems solved by technology

At present, the more accurate method for identifying adulterated starches at home and abroad is mainly by observing and comparing their microstructures, and then comparing them with standard products. This method requires the use of advanced microscopes such as scanning electron microscopes, and the samples must be made into gold-coated films. , high equipment requirements, complex operation, high cost, only suitable for advanced laboratories
Ordinary microscopes are also used to observe, but because the starch granules have a certain three-dimensional thickness and the granules are opaque, the surface characteristics of the starch granules are not clear under the ordinary microscope, which affects the qualitative judgment of the results.
For the adulteration identification of cheap starch doped with lily powder and the quantitative determination of adulteration rate, there is no method reported so far

Method used

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  • Method for quantitatively discriminating true or false lily bulb powder
  • Method for quantitatively discriminating true or false lily bulb powder
  • Method for quantitatively discriminating true or false lily bulb powder

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Embodiment 1

[0015] Embodiment one: with pure lily powder, pure potato flour, pure cassava flour and lily powder doped with potato flour, lily powder doped with cassava flour as an example, distinguish different starch granules and calculate the adulteration rate, its operation steps are:

[0016] 1. Microscopic identification, the steps include:

[0017] (1) Weigh 1 gram of lily powder (cassava powder, potato powder) or 0.5g lily powder + 0.5g potato (cassava) powder in a beaker (the starches are all 300-mesh sieve starch), add 50 grams of water , and stir evenly; (2) Use a pipette to pipette 10 μl onto the glass slide, add 5 μl of Swiss dye dropwise and mix well to make about 1 cm 2 Allow to dry after smearing. (3) Magnify the dried smear by 100 to 400 times under a common microscope to observe and measure the size and morphology of the starch granules. (4) By comparing the morphological features of the tested lily starch granules with the morphological feature maps of various pure st...

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Abstract

The invention discloses a method for quantitatively discriminating genuine and fake lily powder, which is characterized in that: Swiss dyeing solution is adopted to dye the lily and adulterated starch, and the difference on microscopic characteristic of starch grain morphology can be clearly observed by a common microscope, thus accurately qualitatively discriminate the kinds of lily and adulterated starch; a random continuous sampling mode is adopted and image analysis software and a statistical method are used for measuring and calculating the volume and grain quantity of the lily and the adulterated starch; a density bottle method is used for measuring the density of the grain; the adulteration rate of the lily powder can be calculated according to the mass ratio; and therefore the quantitative index of the adulteration rate of the lily powder can be gained quantitatively. The method for quantitatively discriminating genuine and fake lily powder has the advantages of low experiment condition requirement, simple and quick operation, low cost and accurate result.

Description

technical field [0001] The invention relates to a method for identifying true and false lily powder, in particular to a method for quantitatively identifying true and false lily powder. Background technique [0002] Lily is a traditional precious food in my country. It is the first batch of medicinal and edible plants approved by the Ministry of Health. It is known as vegetable ginseng. Lily powder is the dry fleshy scale leaf starch of lily. Because of its low powder yield and high medicinal and edible value, the price of lily powder is relatively high. In recent years, some unscrupulous merchants have mixed some cheap starches (such as potato flour, tapioca flour, sweet potato flour, etc.) into pure lily powder or directly sold them as lily powder with other starches, seriously damaging the interests of consumers. At present, the more accurate method for identifying adulterated starches at home and abroad is mainly by observing and comparing their microstructures, and the...

Claims

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Application Information

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IPC IPC(8): G01N15/00G01N21/84G01N9/00
Inventor 刘成梅罗舜菁黄丽刘伟涂宗财
Owner NANCHANG UNIV
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