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Method for simultaneous determination of multiple trace elements in iron ore

A technology of trace elements and iron ore, which is applied in the direction of measuring devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of low detection limit and inability to measure at the same time, and achieves simple operation, good application effect, and shortened sample time. The effect of processing time

Inactive Publication Date: 2016-05-04
INNER MONGOLIA BAOTOU STEEL UNION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor once invented alkali fusion-hydride generation-atomic fluorescence spectrometry to measure arsenic, antimony, bismuth, lead and tin in ore. Although this method has high sensitivity, low detection limit and fast determination speed, it cannot simultaneously measure zinc, elements such as copper and manganese

Method used

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  • Method for simultaneous determination of multiple trace elements in iron ore
  • Method for simultaneous determination of multiple trace elements in iron ore
  • Method for simultaneous determination of multiple trace elements in iron ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Weigh sandy tin raw ore BY0108-1; vein tin raw ore BY0109-1; steel standard samples YSBC11247, GSBH40061-93 and measure according to the above method, the results are shown in Table 1.

[0056] Table 1 standard sample measurement results

[0057]

[0058] Implementation instructions: because there are few iron ore standard samples with accurate assignment of antimony and bismuth, two steel standard samples are selected for verification in this case; the data with * numbers in the table are all beyond the measurement range of the present invention, and the measured values ​​can only be Reference.

Embodiment 2

[0060] Weigh iron ore GSBH30004; iron ore GSBH30005; iron ore GSBH30001;

[0061] Table 2 standard sample measurement results

[0062]

Embodiment 3

[0063] Embodiment 3: standard addition recovery

[0064] Weigh iron ore standard samples YSBC28778-2008, BH0108-1a, BH0108-2W, 74-8-1 that do not contain antimony and bismuth, and add antimony standard to make the content of antimony and bismuth respectively 0.040at%, 0.100at% , 0.200at%, 0.500at% were determined according to the above method, and the results are shown in Table 3.

[0065] Table 3 standard sample addition standard recovery measurement result

[0066]

[0067] From the data in the above table, it can be calculated that the recovery rates of antimony and bismuth are both 94% to 105%, and the determination results are accurate, meeting the requirements for the determination of arsenic, antimony, bismuth, lead, manganese, copper and zinc in iron ore. Require.

[0068] Therefore, the present invention can quickly and accurately measure the contents of arsenic, antimony, bismuth, lead, manganese, copper and zinc in iron ore by adopting microwave digestion-ICP-M...

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Abstract

The invention relates to a method for simultaneous determination of multiple trace elements in iron ore. The method is characterized in that a sample is treated through microwave digestion; and under optimized apparatus conditions, a plasma mass spectrometer is employed for determinations of trace arsenic, antimony, bismuth, lead, manganese, copper and zinc in the iron ore with Rh as an internal standard. The method has the characteristics of small matrix interference, wide linear scope, high sensitivity, simple operation, and accurate and reliable analysis results. The method can determine arsenic, antimony, bismuth, lead, manganese, copper and zinc in the iron ore within 8 h and shortens sample treatment time, and the scope of the analysis method reaches 0.01 to 0.500 at%. Moreover, the method only uses 7 ml of nitric acid, 1 ml of sulfuric acid (9 mol / L) and 0.5 ml of hydrofluoric acid, so the usage amount of solvents is greatly reduced, and environmental protection is facilitated.

Description

technical field [0001] The invention relates to a method for simultaneously measuring multiple trace elements in iron ore, which is a method for decomposing iron ore samples using microwave digestion technology, using Rh as an internal standard, and using ICP-MS to directly and simultaneously measure samples The invention discloses an analysis method for arsenic, antimony, bismuth, lead, manganese, copper and zinc in solution, belonging to the technical field of iron and steel metallurgy analysis. Background technique [0002] Arsenic, antimony, bismuth, lead, and zinc are harmful impurity elements in steel. Therefore, from ore raw materials to ironmaking and steelmaking, its composition needs to be tested, and the analysis of each element in raw materials is very important. [0003] Although the research on the determination of arsenic, antimony, bismuth, lead, zinc and other elements in ores has a long history, there are still not many simple and effective methods so far....

Claims

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 卢艳蓉
Owner INNER MONGOLIA BAOTOU STEEL UNION
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