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Method for measuring content of metal element cadmium Cd by ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) method

An ICP-AES, metal element technology, applied in material excitation analysis, thermal excitation analysis, etc., can solve problems such as no research

Inactive Publication Date: 2013-08-07
广东量源检测技术有限公司
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  • Summary
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  • Application Information

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Problems solved by technology

[0004] At present, there is no measurement method for the trace metal elements contained in the slag, so there is no in-depth research on the influence of the trace metal element content on the properties of the slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Take the slag sample to be tested and pulverize completely, and take 0.05g sample after passing through a 250 mesh sieve as the sample to be analyzed;

[0034] 2) Place the analyzed sample in a high-pressure digestion tank with a capacity of 100mL, add 60% potassium permanganate solution and let it stand for 10 minutes, then add 15mL of 90% nitric acid and 5mL of 30% HCl to make a sample solution, and then put the Put the high-pressure digestion tank with sample liquid into the blast drying oven; turn on the program control system, set the temperature of the blast drying oven to 200°C, turn off the power after 5 hours of constant temperature, and cool naturally; place the sample liquid for ventilation until the sample The solution is clear, then transferred to a 50mL plastic volumetric flask, and the volume was adjusted to 25mL with ultrapure water to obtain a sample digestion solution; directly add 60% potassium permanganate solution to another 100mL high-pressure di...

Embodiment 2

[0042] The measurement method of this embodiment is the same as that of the embodiment, except that the weighed slag sample is changed from 0.05 g to 0.1 g, and the temperature of the corresponding drying oven is raised to 200° C. to 220° C.

[0043]The invention adopts the method of high-pressure digestion to pre-treat the environmental samples, and measures at 228.801nm by the ICP-AES method, which solves the problem of loss and pollution of the instrument caused by incomplete digestion of the high-pressure digestion method or the result caused by large matrix interference. The problem of large deviations. The ICP-AES method was used to quantitatively determine the Cd element. The detection limit of the method was between 0.03 and 1.6 mg / kg, and the interference of the matrix was small, which could meet the needs of production and life.

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Abstract

The invention relates to a method for measuring metal element cadmium Cd in slag, which is used for measuring the content of trace metal cadmium by an ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry). The method comprises the following steps of: fetching 0.05-0.1g of slag sample; putting the sample into a high-temperature high-pressure digestion tank, and adding a proper amount of potassium permanganate, nitric acid and hydrochloric acid for digestion; putting the high-pressure digestion tank with sample liquid into a blast drying oven, and performing high-temperature digestion in an environment at 200-220 DEG C to obtain a digestion sample; and measuring the content of metal element cadmium Cd in an analysis solution according to certain instrument working parameters by use of the ICP-AES. The method provided by the invention has the advantages of sufficient digestion of measured samples, short measurement time and simple technology, and can meet the needs for production and life.

Description

Technical field: [0001] The invention relates to the field of element analysis, in particular to measuring metal elements by using ICP-AES inductively coupled plasma atomic emission spectrometry. Background technique: [0002] Furnace slag is also called molten slag. The melt produced in the process of pyrometallurgy floating on the surface of liquid substances such as metals is mainly composed of oxides (silicon dioxide, alumina, calcium oxide, magnesium oxide), and often contains sulfide and a small amount of metal entrainment. [0003] Slags for different purposes have different components. Rapid and accurate analysis and determination of various components of slag can prevent environmental pollution and maximize recycling and reuse. [0004] At present, there is no measurement method for the trace metal elements contained in the slag, so there is no in-depth research on the influence of the trace metal element content on the properties of the slag. Invention content: ...

Claims

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Application Information

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IPC IPC(8): G01N21/71
Inventor 傅酉付玉生
Owner 广东量源检测技术有限公司
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