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Pueraria lobata starch adulteration identification method based on principal component analysis

A principal component analysis and principal component technology, applied in the field of infrared spectroscopy identification, can solve rare problems and achieve the effect of easy operation

Inactive Publication Date: 2011-06-08
SOUTHWEST UNIV
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Problems solved by technology

In the prior art, the identification of pueraria starch and its adulterated products can only rely on the morphology, size, structure, composition, ratio of amylose and amylopectin of various plant starches and the composition of long and short chains in amylopectin. There are few studies based on infrared spectroscopy analysis and identification methods

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  • Pueraria lobata starch adulteration identification method based on principal component analysis

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[0032] In order to make the object, technical solution and advantages of the present invention clearer, preferred embodiments of the present invention are described in detail below.

[0033] In order to make the object, technical solution and advantages of the present invention clearer, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] 1 Materials and methods

[0035] 1.1 Experimental materials and sample preparation

[0036] Gefen: first grade, Chongqing Yufeng Biological Products Co., Ltd. (developed by the School of Food Science, Southwest University); sweet potato starch: Shimen Liangxiong Bean Products Factory, Jiangbei District, Chongqing; potato starch: Chongqing Jintian Agricultural Development Co., Ltd. The samples were dried in an oven (105 °C) for 2 h, and then cooled to room temperature in a desiccator. According to Table 1, the samples were accurately weighed by electronic balan...

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Abstract

The invention relates to an identification method of an infrared spectrum, in particular to a pueraria lobata starch adulteration identification method based on principal component analysis (PCA). The method specifically comprises the following steps: tabletting pueraria lobata starch or starch composition mixed with other starch in the pueraria lobata starch to prepare samples and carrying out intermediate infrared scanning under the condition that the wavelength range is 4000-500cm<-1> to obtain the infrared spectrum; carrying out PCA after carrying out baseline adjustment, smoothing processing and vector normalization processing on the infrared spectrum to obtain the principal component score; and carrying out discriminant analysis (DA) on the obtained principal component score and judging pueraria lobata starch adulteration from the DA result. The method has the following beneficial effects: the infrared spectrum of starch is introduced into study; in combination with the chemical analysis and meterage method, the method is simple and easy to operate, has the advantages of rapidness and accuracy; and the correction recognition rate is 100%.

Description

technical field [0001] The invention relates to an identification method of infrared spectrum, in particular to a method for identification of kudzu powder adulteration. Background technique [0002] Pueraria puerariae is a leguminous plant ( Pueraria lobata Ohwi ) root, is a kind of natural plant resource of medicine and food. Pueraria kudzu root is a kind of high-quality wild plant starch, not only rich in essential amino acids and trace elements such as calcium, iron, zinc, selenium, but also isoflavones, puerarin and other substances, which have the functions of clearing heat and detoxifying , promoting body fluid and quenching thirst and other effects. In order to earn profits, unscrupulous traders in the market adulterate a large number of cheap potato starches such as sweet potato flour and potato flour in pure kudzu powder, in an attempt to confuse the fake with the real one. This undoubtedly deceives consumers and greatly reduces market reputation. Commonly used...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3563
Inventor 赵国华明建陈嘉刘嘉李峰
Owner SOUTHWEST UNIV
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