Determination method of content of inorganic phosphorus in sodium phytate

A technology of inorganic phosphorus content and determination method, which is applied in the field of determination of inorganic phosphorus content in sodium phytate, can solve the problem of sample addition and no recovery, etc., and achieves the effects of simple operation and reasonable method.

Inactive Publication Date: 2016-02-24
INSPECTION & QUARANTINE COMPREHENSIVE TECH CENT JIANGXI ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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Problems solved by technology

[0002] Most of the current detection methods in China are suitable for samples with only inorganic phosphorus / organic phosphorus; When the molybdenum blue method and the phosphorus molybdenum yellow method are used for the detection of inorganic phosphorus content, the sample addition is not recovered

Method used

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Effect test

Embodiment 1

[0011] A assay method of inorganic phosphorus content in sodium phytate, at first in sodium phytate sample solution, add ferric chloride solution, make it form precipitation [C 6 h 6 (OH)H 3 (PO 4 ) 6 ] 3 Fe, use the chelation effect of phytic acid and metal ions to remove the influence of sodium phytate matrix, centrifuge at a high speed of 7500r / min to discard the precipitate, then add vanadium molybdenum acid solution to generate yellow phosphovanadium molybdenum acid complex, use The absorbance value was measured at 420nm by a spectrophotometer, and the content of inorganic phosphorus in the sample was calculated according to the standard curve.

Embodiment 2

[0013] A assay method of inorganic phosphorus content in sodium phytate, at first in sodium phytate sample solution, add ferric chloride solution, make it form precipitation [C 6 h 6 (OH)H 3 (PO 4 ) 6 ] 3 Fe, using the chelation effect of phytic acid and metal ions to remove the matrix influence of sodium phytate, centrifuge at a high speed of 8000r / min to discard the precipitate, then add vanadium molybdenum acid solution to generate yellow phosphovanadium molybdenum acid complex, use The absorbance value was measured at 420nm by a spectrophotometer, and the content of inorganic phosphorus in the sample was calculated according to the standard curve.

Embodiment 3

[0015] A assay method of inorganic phosphorus content in sodium phytate, at first in sodium phytate sample solution, add ferric chloride solution, make it form precipitation [C 6 h 6 (OH)H 3 (PO 4 ) 6 ] 3 Fe, using the chelation effect of phytic acid and metal ions to remove the influence of the matrix of sodium phytate, centrifuge at a high speed of 8500r / min to discard the precipitate, and then add vanadium molybdenum acid solution to generate yellow phosphovanadium molybdenum acid complexes. The absorbance value was measured at 420nm by a spectrophotometer, and the content of inorganic phosphorus in the sample was calculated according to the standard curve.

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Abstract

The invention discloses a determination method of the content of inorganic phosphorus in sodium phytate. The determination method comprises the following steps: firstly, adding a ferric trichloride solution into a sodium phytate sample solution to form sediment [C6H6(OH)H3(PO4)6]3Fe; removing base material influences of the sodium phytate by using a chelating effect of phytic acid and metal ions; centrifuging at a high speed to remove the sediment and adding a vanadate molybdate solution to generate a yellow phosphorus-vanadium molybdate coordination compound; determining a light absorption value at 420nm by using a spectrophotometer; calculating the content of the inorganic phosphorus in the sample according to a standard curve. According to the determination method provided by the invention, a base material effect is removed by using ferric trichloride and then a vanadium-molybdenum-yellow method is used for determining the content of the inorganic phosphorus; the method is reasonable and is simple and convenient to operate; the problems that the inorganic phosphorus in the sodium phytate is detected and has no recycling, and the base material interference is eliminated are solved; when the adding concentration is 0.02 percent to 0.08 percent, the recycling rate ranges from 99.0 percent to 102.48 percent, and the relative standard deviation is smaller than 1.16 percent; the technological indexes meet the requirements of GB / T 27404-2008 Food Physicochemical Detection of Laboratory Quality Control Standards.

Description

technical field [0001] The invention relates to the technical field of inorganic phosphorus detection, in particular to a method for determining the content of inorganic phosphorus in sodium phytate. Background technique [0002] Most of the current detection methods in China are suitable for samples with only inorganic phosphorus / organic phosphorus; When the molybdenum blue method and the phosphorus molybdenum yellow method are used for the detection of inorganic phosphorus content, the sample addition is not recovered. Contents of the invention [0003] The object of the present invention is to provide a kind of method reasonable, the assay method of inorganic phosphorus content in the sodium phytate of easy and simple operation, to solve the problem that proposes in the above-mentioned background technology. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] A assay method of inorganic phosphorus content in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/34
CPCG01N1/34
Inventor 郭平吕小丽左海根江龙发于清丽易明祝建新占春瑞石磊
Owner INSPECTION & QUARANTINE COMPREHENSIVE TECH CENT JIANGXI ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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