Method for determining content of mineral elements in formulated food which is used for special medical application

A technology for mineral elements and formula food, which is applied in the field of medical food component detection, can solve the problems of cumbersome determination methods, affect the determination results, sample loss, etc., and achieve the effects of shortening the digestion time, ensuring the digestion effect, and reducing the amount of samples.

Inactive Publication Date: 2018-03-09
HUAREN PHARMACEUTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for determining the content of mineral elements in formula foods for special medical purposes, which solves the problems of cumbersome determination process, difficult control, easy loss of samples and influence on measurement results in the prior art

Method used

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  • Method for determining content of mineral elements in formulated food which is used for special medical application
  • Method for determining content of mineral elements in formulated food which is used for special medical application
  • Method for determining content of mineral elements in formulated food which is used for special medical application

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Effect test

Embodiment 1

[0035] Adopt a kind of method of the present invention to measure the content of 8 kinds of mineral elements of sodium, potassium, calcium, magnesium, zinc, iron, copper and manganese in formula food for special medical purpose simultaneously by utilizing inductively coupled plasma atomic emission spectrometer to measure energy TPF- 1.0 The content of 8 mineral elements including sodium, potassium, calcium, magnesium, zinc, iron, copper and manganese.

[0036] (1) Empty elimination:

[0037] Take 8 digestion tanks, wash them with purified water, add 8mL of 65% nitric acid, cover them, wipe off the surface moisture, and put them symmetrically (in accordance with the position specified in the instruction manual of the microwave digestion instrument) into the microwave digestion instrument. Digest according to the digestion procedure of 2, take it out after the temperature is lower than 80°C, pour out the residual nitric acid in the fume hood, wash it with purified water, and dry...

Embodiment 2

[0058] Using a method of the present invention to simultaneously measure the contents of eight mineral elements in formula foods for special medical purposes, sodium, potassium, calcium, magnesium, zinc, iron, copper and manganese, by using an inductively coupled plasma atomic emission spectrometer The content of 8 mineral elements including sodium, potassium, calcium, magnesium, zinc, iron, copper and manganese.

[0059] (1) Empty digestion: Take 8 digestion tanks, wash them with purified water, add 5mL of 68% nitric acid, cover them, wipe off the surface moisture, and put them symmetrically (according to the position specified in the instruction manual of the microwave digestion instrument) In the microwave digestion apparatus, digest according to the digestion program in Table 4, take it out when the temperature is 60°C, pour out the residual nitric acid in the fume hood, wash it with purified water, and dry it for later use.

[0060] Table 4 Digestion program

[0061] ...

Embodiment 3

[0073] Determination of Jiawei body TPF by using a method of the present invention to simultaneously determine the contents of eight mineral elements, sodium, potassium, calcium, magnesium, zinc, iron, copper and manganese in formula foods for special medical purposes by using an inductively coupled plasma atomic emission spectrometer -Contents of 8 mineral elements in FOS including sodium, potassium, calcium, magnesium, zinc, iron, copper and manganese.

[0074] (1) Empty digestion: Take 8 polytetrafluoroethylene digestion tanks, wash them with purified water, add 12mL of 50% nitric acid, cover them, dry the surface moisture, and put them in symmetrically (microwave digestion apparatus according to the regulations in the manual) Placement) In the microwave digestion apparatus, digest according to the digestion program in Table 6, take it out after the temperature is lower than 80°C, pour out the residual nitric acid in the fume hood, wash it with purified water, and dry it for...

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Abstract

The invention discloses a method for determining the content of mineral elements in a formulated food which is used for special medical application, and belongs to the technical field of component detection for a medical food. According to the method, an inductively-coupled plasma atomic emission spectrometer can determine the content of eight mineral elements, including sodium, potassium, calcium, magnesium, zinc, iron, copper and manganese, in a formulated food which is used for special medical application, at the same time. The method includes preparation of solutions, pretreatment of the solutions, preparation of a mixed standard solution and determination. The solutions include a blank solution and a sample solution. The pretreatment of the solutions is carried out through a nitric acid and microwave digestion method. The solutions are pre-digested through nitric acid and are digested via a microwave digestion device, the obtained products are diluted, and the diluted products undergo ICP-OES determination. The method is short in pretreatment time, less in sample consumption, complete in digestion degree, and high in efficiency, and allows high-temperature operation to be prevented. The sample can be well atomized into a stable plasma state, so that the RSD value in a determination process is efficiently reduced, and the determination result is real, stable and reliable.

Description

technical field [0001] The invention belongs to the technical field of medical food component detection, in particular to a method for measuring the content of mineral elements in formula food for special medical purposes. Background technique [0002] 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 in food for infants and young children and dairy products , Sodium, Potassium, Magnesium, Copper and Manganese Determination" stipulates that the content of 8 mineral elements of ...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/44
CPCG01N1/44G01N21/73
Inventor 苑璐冯新光
Owner HUAREN PHARMACEUTICAL CO LTD
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