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Method for quickly detecting starch coated amount in modified calcium carbonate filler through headspace gas chromatography

A technology of headspace gas chromatography and calcium carbonate filler, applied in the field of papermaking, can solve the problems of low accuracy, large sample volume, cumbersome operation, etc., and achieve the effect of high accuracy, simple operation, and improved normal operation

Inactive Publication Date: 2014-04-02
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the standard methods for the determination of starch are used, such as iodine chromogenic method, optical polarimetry, acid hydrolysis and enzymatic hydrolysis ("GB / T 5009.9-2008 Determination of Starch in Food", "GB / T 5514-2008 Grain and Oil Inspection of Grain, Determination of starch content in oil "), etc., there are problems such as large sample size, low accuracy, or cumbersome operation.

Method used

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  • Method for quickly detecting starch coated amount in modified calcium carbonate filler through headspace gas chromatography
  • Method for quickly detecting starch coated amount in modified calcium carbonate filler through headspace gas chromatography
  • Method for quickly detecting starch coated amount in modified calcium carbonate filler through headspace gas chromatography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Weigh about 5 grams of modified calcium carbonate filler sample (taken from Fujian Jinjiang Youlanfa Paper Co., Ltd.) and grind it in a mortar for 5 minutes.

[0038] 2) Weigh 0.6769 g (by dry weight) of the ground modified calcium carbonate filler sample and place it in a 20 mL headspace bottle, then rinse the modified calcium carbonate adhered to the wall of the headspace bottle with 4 mL of distilled water Fill and seal the headspace vial with a Teflon / butyl rubber gasket and an aluminum cap. Then add 10 mL of sulfuric acid solution with a concentration of 2 mol / L using a syringe. Finally, the headspace vial loaded with the modified calcium carbonate filler was sonicated for more than 5 minutes.

[0039] 3) After ultrasonic treatment, put the headspace bottle containing the modified calcium carbonate filler sample obtained in step 2) into the headspace autosampler, and keep the temperature at 70°C for 10 minutes, and the gas chromatograph (thermal conductiv...

Embodiment 2

[0048] 1) Weigh about 8 grams of the modified calcium carbonate filler sample (taken from the sample prepared in the laboratory) and grind it in a mortar for 10 minutes.

[0049] 2) Weigh 0.5902 g (by dry weight) of the ground modified calcium carbonate filler sample and place it in a 20mL headspace bottle, then rinse the modified calcium carbonate adhered to the wall of the headspace bottle with 4mL distilled water Fill and seal the headspace vial with a Teflon / butyl rubber gasket and an aluminum cap. Then add 10 mL of sulfuric acid solution with a concentration of 2 mol / L using a syringe. Finally, the headspace vial loaded with the modified calcium carbonate filler was sonicated for more than 5 minutes.

[0050] 3) After ultrasonic treatment, put the headspace bottle containing the modified calcium carbonate filler sample obtained in step 2) into the headspace autosampler, and keep the temperature at 70°C for 10 minutes, and the gas chromatograph (thermal conductivity...

Embodiment 3

[0059] 1) Weigh about 5 grams of modified calcium carbonate filler sample (taken from Fujian Xiyuan Paper Co., Ltd.) and grind it in a mortar for 6 minutes.

[0060] 2) Weigh 0.6201g (by absolute mass) of the ground modified calcium carbonate filler sample and place it in a 20mL headspace bottle, then rinse the modified calcium carbonate adhered to the wall of the headspace bottle with 4mL distilled water Fill and seal the headspace vial with a Teflon / butyl rubber gasket and an aluminum cap. Then add 10 mL of sulfuric acid solution with a concentration of 2 mol / L using a syringe. Finally, the headspace vial loaded with the modified calcium carbonate filler was sonicated for more than 5 minutes.

[0061] 3) After ultrasonic treatment, put the headspace bottle containing the modified calcium carbonate filler sample obtained in step 2) into the headspace autosampler, and keep the temperature at 70°C for 10 minutes, and the gas chromatograph (thermal conductivity detector)...

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Abstract

The invention discloses a method for quickly detecting starch coated amount in a calcium carbonate filler modified by the starch through a headspace gas chromatography. The method comprises the steps of weighing a certain amount of a calcium carbonate filler sample modified by the starch, grinding the filler sample by using a mortar, and then generating carbon dioxide by using the modified calcium carbonate filler sample which is acidized and ground by using sulfuric acid, then detecting the content of gas phase carbon dioxide by using a headspace gas chromatography, and calculating the content of calcium carbonate in the modified calcium carbonate filler according to the content of the carbon dioxide. A total mass of the modified calcium carbonate filler sample is deducted by the mass of the calcium carbonate to obtain mass of the starch coating the surface of the calcium carbonate filler. The method is quick, accurate, good in reproducibility and easy to operate. The detection method is applied to a preparation process of the modified calcium carbonate filler in a papermaking enterprise; the detection method is capable of effectively monitoring loss amount of the starch in the preparation process of the modified calcium carbonate filler and a modification effect of the calcium carbonate filler and ensuring quality of the modified calcium carbonate filler, normal operation of a papermaking machine and stability of quality of final products.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a method for measuring the coating amount of starch in modified calcium carbonate fillers. Background technique [0002] In the paper industry, the addition of mineral fillers to pulp has a long history. Due to the advantages of saving plant fiber raw materials, increasing the speed of pulp filtration, and reducing energy consumption in the drying section of the paper machine, filling has been greatly developed in the paper industry. In the raw material composition of today's paper industry, filler is second only to plant fiber, accounting for about 10%, and it is still rising. Among them, due to the development of medium and alkaline papermaking, calcium carbonate, as an alkaline filler, has a pH buffering effect, which stabilizes the pH value of the slurry before applying the adhesive in the optimum pH range of 7.5-8.0; makes the coating The need for cloth adhesives is reduced, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 曹石林马晓娟胡会超黄六莲陈礼辉
Owner FUJIAN AGRI & FORESTRY UNIV
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