Method for detecting mineral elements in formula food for special medical purpose
A technology for formula food and mineral elements, which is applied in the measurement of color/spectral properties, measurement devices, scientific instruments, etc., and can solve the problems of unstable measurement results and complicated measurement steps.
Inactive Publication Date: 2020-12-29
特康药业集团有限公司
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[0004] Existing assay methods have complex steps and unstable measurement results
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[0027] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them.
[0028] A detection method for mineral elements in formula foods for special medical purposes:
[0029] principle:
[0030] After the sample is digested, it is atomized by atomic absorption flame, and the concentration of sodium, potassium, zinc, magnesium, iron, manganese and copper are respectively determined at 330.2nm, 404.7nm, 213.9nm, 202.6nm, 248.3nm, 279.5nm and 324.7nm. Absorbance value: After atomic absorption graphite furnace atomization, the absorbance value of lead is measured at 283.3nm. Within a certain concentration range, the absorbance value of sodium, potassium, zinc, magnesium, iron, manganese, copper, and lead is proportional to its content, which is quantitative compared with the standard series.
[0031] Reagents an...
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Abstract
The invention discloses a method for detecting mineral elements in formula food for a special medical purpose, and relates to the technical field of food detection. The method comprises the followingsteps: firstly, preparing a standard solution, then preparing a standard intermediate solution, drawing a standard curve, then preparing a sample solution, drawing a sample curve, and finally determining the contents of sodium, potassium, zinc, magnesium, iron, manganese, copper and lead in the formula food for the special medical purpose. According to the method, after a food sample is digested,the food sample is atomized by an atomic absorption flame, and the absorbance values of sodium, potassium, zinc, magnesium, iron, manganese and copper are respectively measured at different wavelengths; and the food sample is atomized by an atomic absorption graphite furnace, and the absorbance value of lead is measured. The absorbance values of sodium, potassium, zinc, magnesium, iron, manganese,copper and lead within a certain concentration range are in direct proportion to the contents of the sodium, potassium, zinc, magnesium, iron, manganese, copper and lead, and are compared with a standard series for quantification.
Description
technical field [0001] The invention relates to the technical field of food detection, in particular to a method for detecting mineral elements in formula foods for special medical purposes. Background technique [0002] Special food refers to food specially processed according to special formula to meet the physiological needs of some special groups of people or the nutritional needs of patients with certain diseases. [0003] At present, there are mainly four methods for determining the mineral content of food, namely titration, colorimetry, atomic absorption spectrophotometry and inductively coupled plasma atomic emission spectrometry, among which colorimetry, titration and atomic absorption Spectrophotometry is a single-element analysis method, and inductively coupled plasma emission spectrometry is a multi-element simultaneous determination method; the national standard of the People's Republic of China GB 5413.21-2010 food safety national standard "Calcium, iron, zinc ...
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IPC IPC(8): G01N21/31
CPCG01N21/3103G01N2021/3114
Inventor 张灵燕史春华张相玲赵慧李新艳田文娜牛一菲
Owner 特康药业集团有限公司