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Method for detecting content of calcium element in calcium powder

A detection method and technology of calcium element, applied in material excitation analysis, thermal excitation analysis and other directions, can solve the problems of inability to guarantee the accuracy of the results, incomplete ashing, complicated processing methods, etc., and achieve low element loss and pollution rate, parallel Good results and simple method

Inactive Publication Date: 2010-04-14
INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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Problems solved by technology

Taking the dry ashing method as an example, the sample is weighed and transferred to an electric heating plate for carbonization, then placed in a high-temperature furnace for ashing at 490°C for eight hours, and then cooled to room temperature before dissolving with a solvent. The sample processing method is cumbersome. Because calcium powder is mainly composed of inorganic substances, incomplete ashing will occur every time
The accuracy of the results cannot be guaranteed

Method used

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  • Method for detecting content of calcium element in calcium powder
  • Method for detecting content of calcium element in calcium powder
  • Method for detecting content of calcium element in calcium powder

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Embodiment 1

[0029] The drawing of embodiment 1 standard curve

[0030] 1. Preparation of standard solution

[0031] Prepare the standard solution of calcium: accurately draw the calcium standard stock solution (concentration 1000 μ g / ml, the single standard purchased by the National Standard Material Research Center) according to the volume listed in Table 1, in the 50ml volumetric flask, use 2% hydrochloric acid to make the volume accurately, Prepare a standard solution and mix well. The flame configuration standard solution is to make the standard stock solution into a 50ug / ml intermediate solution, and then take the intermediate solution to configure a series of solutions. Get the final standard series solutions, transfer them to polyethylene bottles, and store them in a refrigerator at 2-6°C in the dark for 2 weeks.

[0032] Table 1 The amount of stock solution required to prepare the standard series of solutions (unit: ml)

[0033]

[0034] The converted concentration is shown ...

Embodiment 2

[0054] The detection of calcium content in embodiment 2 calcium powder

[0055] Methods: The OPtima5300DV inductively coupled plasma optical emission spectrometer (ICP-OES) produced by Perkin-Elmer, USA was used to determine the calcium element in the calcium powder, and the Hitachi Z-2000 flame atomic absorption spectrophotometer was used to detect the calcium element content in the calcium powder.

[0056] Detection steps:

[0057] 1. Instrument preparation:

[0058] (1) Turn on the host and operating software, adjust the instrument to the best state, turn on the argon gas and water cooling cycle, and preheat for four hours.

[0059] (2) Check the water seal, install the hollow cathode lamp, open the operating software and the host, adjust the instrument to the best state, and preheat. After the instrument is preheated, turn on the water-cooling cycle, turn on the acetylene gas switch, and ignite the test sample.

[0060]2. Preparation of samples: Calcium powder was weigh...

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Abstract

The invention relates to a method for detecting content of calcium element in calcium powder, which comprises the following steps: firstly, sampling, secondly, processing samples, thirdly, comparing the sample detecting method and standard curved lines, and getting the content of calcium element in samples, a detecting device is jigger coupling plasma emission spectrometer and a flame atomic absorption spectrophotometer. Samples are dissolved by hydrochloric acid, utilize the component characteristics of calcium powder, are atomized by an instrument spray chamber, pass through a high temperature torch tube, and adopt a multiple reaction monitoring method to definite quantity. The instrument detection limit of the method is 0.096, 0.87ug / mL, the correlation coefficient r is above 0.999 in the linear range of elements, and the recovery ratio is 98.6%-108.7%. The method can quickly and accurately measure the content of calcium elements in calcium power, has little element loss and pollution rate in the preparing process of samples, and has accurate and reliable results, excellent repeatability and high sensitivity.

Description

technical field [0001] The present invention relates to a method for detecting the content of calcium element in calcium powder, in particular to a method for directly sampling and detecting calcium element calcium in calcium powder by using an inductively coupled plasma emission spectrometer and a flame atomic absorption spectrophotometer, which belongs to chemical composition detection technical field. Background technique [0002] Although the content of trace elements in the human body is not much, they are closely related to human survival and health. With the development of society and the improvement of living standards, calcium powder is widely used as a nutritional health product. At present, the detection of trace element content in calcium powder is still based on the method of detection of trace element content in milk powder, but the composition of calcium powder is different from that of milk powder. The main component of calcium powder is carbonate, which doe...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N21/71
Inventor 其其格常建军刘卫星
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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