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An absorptiometry, molybdenum concentrate technology, applied in the field of analytical chemistry, can solve the problems of shortening the test cycle, cumbersome steps, time-consuming and laborious, and reducing the cost of the test, and achieves the effect of shortening the test period, reducing the cost and improving the accuracy.

Inactive Publication Date: 2008-03-12
邹平容诚金属科技集团有限公司
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Problems solved by technology

It overcomes the time-consuming and labor-intensive steps of gravimetric determination of molybdenum c

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[0021] This test method is based on the following experiments:

[0022] 1. Preparation of reference solution:

[0023] The preparation standard of the reference solution is that the absorbance of the solution to be tested is about A=0.434, and the relative reading error is the smallest at this time. According to the content of molybdenum in the molybdenum concentrate in this method, it is determined that the solution containing molybdenum 10ug / ml is the reference solution for the test after many tests. For the preparation method, see the section on the drawing of the standard curve.

[0024] 2. Preparation of main reagents:

[0025] a. Sulfuric acid-copper sulfate-oxalic acid mixed solution: take 1000ml of concentrated sulfuric acid and slowly add it to 1000ml of water under constant stirring, add 2g of oxalic acid, 20ml of copper sulfate solution containing 20g / ml of copper, cool it, transfer it into a 2000ml reagent bottle and shake well for later use .

[0026] b. Thiour...

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Abstract

The present invention relates to a method to measure molybdenum content in molybdenum concentrate with a differential spectrophotometry method belonging to the field of analytical chemistry, which adopts the differential spectrophotometry method to measure a series of concentrations of standard solutions to obtain a slope K and an intercept b of a standard curve. In addition, 10ug/ml molybdenum solution is provided for the test as reference solution. Absorbency of the solution to be tested is measured with the differential spectrophotometry method. The slope K and the intercept b of the standard curve are input. An instrument automatically calculates molybdenum content in the tested solution according to the absorbency. The method removes hard operation due to excessive steps of gravimetric method to measure molybdenum content, greatly reduces assay period, saves reagents, water and electricity and decreases assay cost.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, in particular to a method for measuring molybdenum content in molybdenum concentrates by means of differential absorptiometry. Background technique [0002] The determination of molybdenum content in molybdenum concentrate generally adopts the lead molybdate gravimetric method. This method has stable and reliable results, high precision, and good reproducibility. It is widely used and has become the specified analysis method in national standards and arbitration analysis. However, the disadvantage of this method is that the steps are cumbersome, the requirements for chemicals and personnel are high, the analysis period is long, and it cannot well meet the requirements of accurate, fast, and simple production patterns. In addition, the heavy metal lead will seriously pollute the environment, harm the health of human body, animals and plants, the amount of reagents used is large, and the cost of...

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Application Information

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IPC IPC(8): G01N21/78G01N21/17
Inventor 李信李执强
Owner 邹平容诚金属科技集团有限公司
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