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Method for quickly detecting iodine in ore

A rapid determination of ore technology, applied in the field of analysis and testing, can solve the problems of iodine compound volatilization, low content, and influence on the measurement results, and achieve the effects of short time, high accuracy and low energy consumption

Active Publication Date: 2013-03-20
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the former is only for free molecular iodine. Due to the activity of iodine, its content is very small, and the measurement results are inaccurate; The leaching method takes a long time, generally more than 32h

Method used

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  • Method for quickly detecting iodine in ore
  • Method for quickly detecting iodine in ore
  • Method for quickly detecting iodine in ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The rapid determination method of iodine in ore, comprises the following steps:

[0019] (1) Use GB / T1878-1995 to prepare iodine standard solution 10ug / mL, measure 0.4, 1.0, 2.0, 4.0, 7.0, 10.0mL iodine standard solution into a set of 50mL volumetric flasks, add 0.5mL anhydrous Na 2 SO 3 Solution 13g / L; 2.0mL NaF solution 25g / L; two drops of bromocresol green indicator solution; use H 2 SO 4 The volume ratio of the solution is 1:2 and the solution is neutralized until the solution is yellow, and one drop is added in excess, and the carbon dioxide in it is removed by shaking for a while; then the solution is adjusted to be blue-green with 50 g / L NaOH solution; add 2 mL of citric acid-sodium citrate buffer solution to pH5; Dilute to the mark with deionized water and pour into a 50mL beaker. Insert an iodine ion selective electrode and a saturated calomel electrode, under the stirring of a magnetic stirrer, measure the electrical position at equilibrium, take the potent...

Embodiment 2

[0028] (1) adopt the iodine standard curve that embodiment 1 draws;

[0029] (2) Take the Saudi ore sample m=2.2070g (particle size ≥ 200 mesh) (with the sample as reagent blank) in a 250mL beaker, add 20mL of hydrochloric acid solution with a volume ratio of 1:5 under constant stirring, and cover the watch glass, Mix well, heat to about 80°C on an adjustable temperature electric furnace, keep for 10min, remove the beaker, rinse the watch glass and cup wall with deionized water, cool, dry filter with medium-speed filter paper and wash the acid insoluble matter with deionized water 5 times, collect the filtrate and washing solution to a constant volume of 100mL to obtain the solution to be tested;

[0030] (3) Draw 25mL of the solution to be tested, pour it into a 50mL volumetric flask, add 0.5mL of 1.3% anhydrous sodium sulfite solution, 2.0mL of 2.5% sodium fluoride solution, two drops of 0.1% bromocresol green indicator solution, and use volume ratio After the sulfuric acid...

Embodiment 3

[0037] (1) adopt the iodine standard curve that embodiment 1 draws;

[0038] (2) Weigh the Wengfu mine sample m 3 =2.2290g (particle size ≥ 200 mesh) (reagent blank along with the sample) in a 250mL beaker, add 20mL of hydrochloric acid solution with a volume ratio of 1:3 under constant stirring, cover with a watch glass, mix well, and place on an adjustable temperature electric furnace After heating to about 60°C and keeping it for 40 minutes, remove the beaker, rinse the watch glass and the cup wall with deionized water, cool, dry filter with medium-speed filter paper and wash the acid insoluble matter with deionized water for 4 times, collect the filtrate and washing liquid 100mL to obtain the solution to be tested;

[0039](3) Take 25mL of the solution to be tested, pour it into a 50mL volumetric flask, add 0.5mL of 1.3% anhydrous sodium sulfite solution, 2.0mL of 2.5% sodium fluoride solution, two drops of 0.1% bromocresol green indicator solution, and use volume ratio ...

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Abstract

The invention discloses a method for quickly detecting iodine in an ore, which comprises the following steps: drawing a standard iodine curve, dissolving the ore by a hydrochloric acid solution with aspecified concentration under a heating condition, filtering and washing the insolubles, collecting the filtrate and cleaning solution and finally analyzing the content of iodine in the collecting liquid by an ionic selective electrode method, thus detecting the content of the iodine in the ore. The method has the advantages of low energy consumption, short time and high accuracy.

Description

technical field [0001] The invention relates to an analysis and testing method, in particular to a method for determining iodine in ore. Background technique [0002] As an important inorganic chemical raw material and an element necessary for life, iodine plays a pivotal role in the national economy. At present, the determination methods of iodine content in ores include iodine blue spectrophotometry and ion selective electrode method on the basis of GB / T1878-1995. The former needs to go through acidolysis, ion exchange, and color reaction; the latter needs to use Na 2 CO 3 -ZnO mixed flux and ore are pretreated under high temperature conditions. The two methods are not only complicated in process and high in energy consumption, but also take a long time and have low accuracy in the determination of iodine. Some literature points out that the iodine content in the ore sample can be determined by heating sublimation method and hot water leaching method. However, the for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/333
Inventor 田言杨帆解田杨丽萍
Owner WENGFU (GRP) CO LTD