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Method for detecting content of heavy metal elements in metal or alloy material

A technology of alloy materials and detection methods, applied in the direction of material excitation analysis, preparation of test samples, thermal excitation analysis, etc., can solve the problems of protein denaturation, toxicity, etc., and achieve high accuracy, good repeatability and reproducibility, detection The effect of simple method

Inactive Publication Date: 2014-07-02
昆山洛丹伦生物科技有限公司
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Problems solved by technology

The ions of heavy metal elements are generally toxic. For example, copper is non-toxic, but copper ions denature proteins and are toxic.

Method used

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  • Method for detecting content of heavy metal elements in metal or alloy material
  • Method for detecting content of heavy metal elements in metal or alloy material
  • Method for detecting content of heavy metal elements in metal or alloy material

Examples

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Effect test

Embodiment 1

[0036] (a) Weigh the sample linear diode plastic part with an electronic balance and cut it into particles no larger than 0.2g, and put it into a 100ml beaker;

[0037] (b) Add 10ml of analytically pure nitric acid to the beaker containing the sample: analytically pure hydrochloric acid=3:1 (volume ratio) solution, observe whether the sample is completely dissolved, if not, add a small amount of the above solution until the sample is completely dissolved If the sample cannot be completely dissolved, it can be heated on a heating plate at 100°C for 5-10 minutes until the metal sample is completely dissolved; the beaker used for pretreatment is rinsed with a small amount of deionized water, filtered with 0.45μm filter paper, and quantified to 100ml in the volumetric flask, and finally quantify it with deionized water to the scale line of the volumetric flask;

[0038] (c) ICP-OES quantitative analysis.

[0039] The content (in mg / kg) and repeatability of heavy metal elements in...

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Abstract

The invention discloses a method for detecting content of heavy metal elements in metal or an alloy material. The method comprises the following steps: (a) processing a sample into grains which are not heavier than 0.2g; (b) adding the sample processed in the step (a) into a mixture solution of analysis pure nitric acid and analysis pure hydrochloric acid to completely dissolve the sample, wherein the ratio of the sample to the mixture solution is 1:(15-25g / ml), and the volume ratio of the analysis pure nitric acid to the analysis pure hydrochloric acid in the mixture solution is (1-5):1; (c) putting the completely filtered dissolved solution into a volumetric flask, and achieving a constant volume, wherein the ratio of the quantified volume to the sample mass is (150-250):1ml / g; and (d) performing inductively coupled plasma-optical emission spectroscopy (ICP-OES) analysis on the solution obtained in the step (c). The analysis method provided in the invention is rapid, and high in repeatability and reproducibility.

Description

technical field [0001] The invention relates to a method for detecting the content of heavy metal elements, in particular to a method for detecting the content of heavy metal elements in metal or alloy materials. Background technique [0002] Heavy metal elements generally refer to metal elements with an elemental density greater than 4500kg / m3 under standard conditions, which are different from light metal elements (such as aluminum and magnesium). Common heavy metal elements are cadmium (Cd), mercury (Hg), arsenic (As), Cr (chromium), copper (Cu), barium (Ba), lead (Pb), etc. The ions of heavy metal elements are generally toxic. For example, copper is non-toxic, but copper ions denature proteins and are toxic. [0003] As more and more metals or alloys are used in industrial production, more and more waste is generated, which has brought a huge impact on the global ecological environment. Among them, the pollution of heavy metal elements to the environment is becoming mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28
Inventor 王生兵
Owner 昆山洛丹伦生物科技有限公司
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