A Headspace Gas Chromatography Method for Detecting the Exchange Capacity of Ion Exchange Resins

A technology of headspace gas chromatography and ion exchange resin, applied in the field of headspace gas chromatography, can solve the problems of difficult identification of titration end point, complicated operation process, large error, etc., and achieve the effect of shortening the detection time and rapid detection method

Inactive Publication Date: 2020-02-18
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The operation process of this method is complicated and time-consuming, and because the titration end point is not easy to distinguish, it introduces a large error

Method used

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  • A Headspace Gas Chromatography Method for Detecting the Exchange Capacity of Ion Exchange Resins
  • A Headspace Gas Chromatography Method for Detecting the Exchange Capacity of Ion Exchange Resins
  • A Headspace Gas Chromatography Method for Detecting the Exchange Capacity of Ion Exchange Resins

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Experimental program
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Effect test

Embodiment 5

[0100] (51) Weakly basic anion exchange resin sample preparation

[0101] Take two portions of 0.5g (accurate to 0.001g) of hydroxide type weak base anion exchange resin in a 50ml dry corked Erlenmeyer flask, use a pipette to draw 25ml 0.1mol / L hydrochloric acid standard solution into the corked Erlenmeyer flask, shake Mix well, cover tightly, soak in 40°C water bath for 2 hours, take it out, and cool to room temperature. Filter with a strainer and take the filtrate. Use a 100ul micro-syringe to draw 200ul (twice) filtrate to pierce the rubber septum, inject it into a headspace bottle filled with 3ml 0.05mol / L sodium bicarbonate solution, shake well, and wait for the test.

[0102] (52) Establish standard curve

[0103] React with the sodium bicarbonate solution in the step (51) with the hydrochloric acid standard solution of known different concentrations, place the headspace bottle, then carry out the reaction described in the step (51); After processing, will contain the ...

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Abstract

The invention discloses a headspace gas chromatography method for detecting exchange capacity of an ion exchange resin. The method is specifically used for determining the exchange capacity of the ion exchange resin by using headspace gas chromatography. The method comprises the following steps: (1) performing sample pretreatment; (2) performing sample preparation; (3) establishing a standard curve; (4) detecting the sample by adopting the headspace gas chromatography; and (5) calculating the result. According to the method disclosed by the invention, the chromatographic signal value of carbon dioxide is determined by utilizing the analysis method of headspace gas chromatography, and the exchange capacity of the ion exchange resin is further obtained. The method is simple, rapid and reliable, and is particularly suitable for detecting the resin exchange capacity on a large scale.

Description

technical field [0001] The invention relates to headspace gas chromatography, in particular to a headspace gas chromatography for detecting the exchange capacity of ion exchange resins. Background technique [0002] Ion exchange resin is a kind of network structure polymer compound with active groups, which is composed of a network matrix skeleton and active groups capable of ion exchange. Water treatment, construction, chemical industry, papermaking, electronics, food, medicine and other fields. At present, ion exchange resin is mainly used for water treatment and purification of water system, and its performance will directly affect the effect of water treatment. The exchange capacity of the ion exchange resin is the most important index to characterize the performance of the ion exchange resin. It reflects the exchange and adsorption capacity of the resin to ions. Therefore, it can quickly and effectively detect the exchange capacity of the commercially available ion exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 吴娜何亮柴欣生
Owner SOUTH CHINA UNIV OF TECH
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