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Palladium solid phase extraction column with color rendering and indicating functions

A solid-phase extraction column and color indicator technology are applied in the fields of analytical chemistry and precious metal metallurgy. and other problems, to achieve the effect of easy control of the adsorption process

Inactive Publication Date: 2013-03-06
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these solid-phase extraction agents also do not have color indication function and qualitative function. During use, it is impossible to directly judge whether the sample contains palladium, nor can it directly judge the working state of the extraction agent, such as: whether the adsorbent has Adsorbed palladium, the utilization rate of the packing in the column, whether the adsorption is saturated, and whether the palladium adsorbed on the column has been eluted and recovered completely, etc.

Method used

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  • Palladium solid phase extraction column with color rendering and indicating functions

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A solid-phase extraction column with palladium color indication function, comprising a transparent column tube 3, the lower end of the transparent column tube 3 has a necked tail nozzle 4, and the transparent column tube 3 is equipped with an enrichment and separation filler 2, which is transparent Microporous sieve plates 1 are respectively arranged at the bottom and top of the enrichment and separation filler 3 in the column tube 3. The characteristic is that the powder filler is surface-functionalized magnesium titanate powder, and the color changes when palladium is extracted.

[0027] A kind of preparation method of the solid-phase extraction column with palladium of chromogenic indication function comprises the following steps:

[0028] (1) Preparation of magnesium titanate-based chromogenic filler: According to the invention patent "Application of nano-magnesium titanate as solid-phase extraction adsorption medium in the enrichment of heavy metal ions" published b...

Embodiment 2

[0032] Separation and enrichment: Take 1 mL of 1 μg / mL palladium standard solution in a 500 mL volumetric flask, add an equal amount of Al 3+ 、Au 3+ , Pt 2+ 、Ni 2+ , Sn 2+ , Zn 2+ , Fe 3+ , Ca 2+ , Mg 2+ 、Ba 2+ 、Cu 2+ 、Cd 2+ , make up to the mark with hydrochloric acid solution with a pH value of 2, and mix well. Driven by a peristaltic pump, pass through the column at a flow rate of 1mL / min, and then pass through 5mL of hydrochloric acid solution with a pH value of 2 under the same conditions to wash away impurities, and the packing near the inlet end of the column will appear yellow. Pass the mixed solution of 10% ethylenediamine-1% sodium hydroxide through the column at a flow rate of 1mL / min, and observe the color change of the column. Take off completely, continue to pass column and collect 2mL eluent altogether, after adjusting the pH value, measure the content of ion in the eluent with flame atomic absorption, the recovery rate of calculation palladium is 97....

Embodiment 3

[0034] Analysis application——Qualitative analysis, pre-concentration and separation of palladium in wastewater: Take 100mL of wastewater from smelter A, adjust the pH value to 2 with hydrochloric acid and sodium hydroxide solution, filter to remove solid impurities, and drive with a peristaltic pump , let the water sample pass through the analytical solid-phase extraction column prepared in step 1 (2) of Example 1 at a flow rate of 1mL / min. As the water sample flows through the column, the column packing starts to change from ivory white to yellow. It is preliminarily judged that the water sample Containing palladium, when 100mL of water samples passed through the column, the color area of ​​the column accounted for one-third of the column volume, indicating that the column did not leak during the adsorption and enrichment process. After adsorption, the column passed through 5 mL of hydrochloric acid solution with a pH value of 2, and the yellow color did not fade away, further...

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Abstract

The invention discloses a palladium solid phase extraction column and a using method thereof. According to the palladium solid phase extraction column disclosed by the invention, magnesium titanate is used as a matrix; dimethylglyoxime with a color rendering function is modified and loaded on the matrix; and a prepared palladium solid phase extracting agent with the adsorbing, color rendering and indicating functions is filled in a colorless and transparent column pipe to obtain the solid phase extraction column with the color rendering and indicating functions; and the solid phase extraction column is used for qualitative analysis and pre-enrichment and separation of palladium ions in a water sample in the analyzed and monitored field and can also be used for separation, enrichment and recovery of palladium in the metallurgy field. The palladium solid phase extraction column with the color rendering and indicating functions, which is disclosed by the invention, can be used for conveniently and qualitatively judging the palladium in solution directly by color change; in the process of separating, enriching and recovering the palladium, the extraction state and the use condition of the column can be judged by color; and the column has good selectivity, is stable, has strong enrichment and separation capacity and is convenient to use.

Description

technical field [0001] The present invention relates to the field of analytical chemistry and precious metal metallurgy, relates to the solid phase extraction of palladium, in particular, relates to a solid phase extraction column with color indicating function and its application to the pre-separation and enrichment column of palladium in analytical chemistry and It is applied to the separation, enrichment and recovery of palladium in the field of precious metal metallurgy. Background technique [0002] Palladium is a member of Group VIII platinum group elements in the fifth cycle. It is a chemical element discovered by the British chemist Wollaston from platinum ore in 1803. Palladium is an important rare precious metal, mainly used as industrial catalysts, automobiles Exhaust purification catalysts and the production of electronic appliances, etc., play a key and core role in cutting-edge technology fields and modern industries such as petrochemicals, automobiles, electro...

Claims

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Application Information

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IPC IPC(8): B01D15/20B01J20/22B01J20/30
Inventor 张东霍明雷任广军宋恩军
Owner SHENYANG LIGONG UNIV
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