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Fast analyzer and determination method for determining heavy-metal cadmium in foodstuffs

A rapid analysis, heavy metal technology, applied in the analysis of materials, the use of wave/particle radiation for material analysis, instruments, etc., to achieve the effect of convenient on-site measurement, accurate results, and rapid measurement

Inactive Publication Date: 2014-03-19
NCS TESTING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the X-ray fluorescence analysis device specially aimed at measuring heavy metals in grain has not been reported so far

Method used

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  • Fast analyzer and determination method for determining heavy-metal cadmium in foodstuffs
  • Fast analyzer and determination method for determining heavy-metal cadmium in foodstuffs
  • Fast analyzer and determination method for determining heavy-metal cadmium in foodstuffs

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Embodiment Construction

[0052] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0053] The grain sample of this embodiment is Hunan rice flour, and the determination of other grains is similar to it. Such as Figure 3a , as shown in 3b, use the cadmium element enrichment device, turn on the power supply, and let the furnace actively heat for about 15 minutes, so that the temperature in the chamber of the ashing furnace 9 reaches the preset value of 480 ° C, and the heating indicator light in the control panel 7 is off to indicate that it has reached target temperature.

[0054] Fill up the rice with measuring cup, pour the rice to be tested into the quartz tube with screen retaining, and put it into the ashing furnace 9 to be burned for 10 minutes, then take it out and cool it.

[0055] Pour the carbonized sample into the Figure 4 After the sample cup 5 is shown, gently tilt it t...

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Abstract

The invention relates to a fast analyzer for determining the content of heavy-metal cadmium in foodstuffs. The fast analyzer comprises a heavy-metal cadmium enrichment device, an X-ray fluorescence analyzing device, a sample cup (5) and an intelligent control device, wherein determined foodstuffs are subjected to carbonization and then ashing by adopting the heavy-metal cadmium enrichment device, so as to enrich cadmium in the determined foodstuffs; ash in the obtained determined foodstuffs is placed in the sample cup (5) and is pressed into a sample, the weight of the sample and the weight of the ash are input, then, the X-ray fluorescence analyzing device carries out measurement so as to obtain the signal intensity of cadmium, and the content of cadmium in the sample is calculated. Due to the adoption of sample carbonization and ashing treatment, physical pressing and X-ray fluorescence spectrometry, the analyzer has the characteristics of simplicity in sample preparation, high measuring speed, accuracy in result, convenience in field measurement, and the like.

Description

technical field [0001] The invention belongs to the analysis field of heavy metal cadmium in grain, and provides a portable rapid analyzer for cadmium in grain, which can quickly and accurately measure the content of cadmium in grain, so as to determine whether the cadmium content exceeds the national standard. Background technique [0002] Cadmium, chemical symbol Cd, melting point 320.9°C, boiling point 765°C, ranks 48th in the periodic table of elements, can cause human poisoning, including carcinogenicity, kidney failure, bone pain, etc. [0003] Studies have shown that rice is the most cadmium-absorbing bulk cereal crop, and the cadmium content in its grain is second only to lettuce. Generally, rice with excessive cadmium content is commonly known as "cadmium rice". my country's health standards for cadmium limits in food stipulate that the cadmium content in rice is ≤0.2mg / kg, the cadmium content in flour is ≤0.1mg / kg, the cadmium content in meat and fish is ≤0.1mg / kg...

Claims

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Application Information

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IPC IPC(8): G01N23/223
Inventor 袁良经程大伟于雷周超张胜坤吴利民黄小峰卓明
Owner NCS TESTING TECH
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