Detection method of content of acrylamide monomer in paper and paper product

A technology of acrylamide monomer and detection method, which is applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of increased uncertainty in the accuracy of measurement results, long processing cycles, expensive instruments, etc., to avoid baseline instability, The effect of improving extraction speed and improving measurement accuracy

Inactive Publication Date: 2015-01-21
GUANGDONG DONGGUAN QUALITY SUPERVISION TESTING CENT
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The GC-MS method requires bromination derivatization of the sample, which makes the sample processing cycle longer and the operation more complicated. More importantly, it adds uncertain factors to the accuracy of the measurement results.
Using the HPLC-MS / MS method, there is no need to derivatize the sample, and the operation is relatively simple, but the equipment used is relatively expensive
And these methods are specially designed for food testing. For different products, the pre-treatment methods are very different, so these methods are only of reference value

Method used

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  • Detection method of content of acrylamide monomer in paper and paper product
  • Detection method of content of acrylamide monomer in paper and paper product
  • Detection method of content of acrylamide monomer in paper and paper product

Examples

Experimental program
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Embodiment 1

[0023] Embodiment 1 draws standard curve

[0024] Standard solutions of acrylamide with concentrations of 0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, and 1.0 μg / mL were prepared by conventional methods, and analyzed by high performance liquid chromatography (HPLC) under the following conditions:

[0025] Chromatographic column (Waters2695): C18, stationary phase particle size 5μm, 250mm×4.6mm (inner diameter) or equivalent; column temperature: 30°C; detection wavelength: 197nm; mobile phase: methanol:water=5:95 (volume ratio) ; Flow rate: 1.0 mL / min; Injection volume: 20 μL.

[0026] like figure 1 As shown, according to the HPLC spectrogram, under the given conditions above, the retention time of acrylamide is 4.6min. Take the acrylamide concentration as the abscissa and the chromatographic peak area as the ordinate to draw a standard curve, see figure 2 , get the regression equation y=24879x+197.8, correlation coefficient R2=0.9999. It can be seen that within the concentration ran...

Embodiment 2

[0028] In this embodiment, a certain writing paper purchased in the market is used as the tested sample, and 5g of paper sample is weighed to an accuracy of 0.1mg. The ratio of (ml) to paper sample (g) is 4:1, cover the stopper, shake the Erlenmeyer flask in a constant temperature water bath at 60°C for 2 hours, then take out the Erlenmeyer flask, cool it to room temperature, and place it in a high-speed centrifuge Centrifuge at 1000r / min for 20min, and filter the supernatant liquid through a 0.45μm membrane filter. Take 1.0mL of the filtrate to pass through the HLB solid phase extraction column. Before passing through the HLB solid phase extraction column, use 3.5mL methanol and 3.5mL water to activate the HLB solid phase extraction column in advance. After all the filtrate flows out of the solid phase extraction column, use 3mL5% elute with methanol aqueous solution, collect the eluate, filter through a 0.22 μm filter membrane, and wait for HPLC detection.

[0029] Adopt th...

Embodiment 3

[0031] In this embodiment, a certain living paper purchased in the market is used as the tested sample, and 5g of paper samples are weighed to an accuracy of 0.1 mg. After the paper samples are pulverized, they are added to a conical flask with a stopper, and then 30ml of aqueous methanol is added to the conical flask. The ratio of methanol aqueous solution (ml) to paper sample (g) is 6:1, the volume fraction of methanol is 5%, cover the stopper, place the Erlenmeyer flask in a constant temperature water bath at 30°C for 4 hours, then take out the Erlenmeyer flask and cool to room temperature, placed in a high-speed centrifuge and centrifuged at 1000r / min for 20min, and the supernatant liquid was filtered through a 0.45μm membrane filter. Take 1.0mL of the filtrate to pass through the HLB solid phase extraction column. Before passing through the HLB solid phase extraction column, use 3.5mL methanol and 3.5mL water to activate the HLB solid phase extraction column in advance. Af...

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Abstract

Provided is a detection method of the content of an acrylamide monomer in paper and paper products. The detection method comprises following steps: preparing an acrylamide standard solution, drawing a standard curve after HPLC analysis, weighing a certain amount of a paper sample, adding distilled water or a methanol aqueous solution for extraction, enabling an extract to pass through a solid-phase extraction column, and obtaining the content of the acrylamide monomer in the paper sample through HPLC analysis according to the standard solution. In the method, water or the methanol aqueous solution is employed as an extraction reagent so that a measuring precision and detection efficiency are greatly increased.

Description

technical field [0001] The invention relates to a method for detecting the content of acrylamide monomer in paper and paper products. Background technique [0002] Polyacrylamide (polyacrylamide, referred to as PAM) is a general term for homopolymers and copolymers of acrylamide (abbreviated as AM) and its derivatives. One of the earliest and most widely used papermaking additives. In the paper industry, PAM with low molecular weight (molecular weight < 1 million) is generally used as a paper strengthening agent, PAM with medium molecular weight (molecular weight 2 million to 5 million) is generally used as a retention and drainage aid, and PAM with high relative molecular weight (Molecular weight > 8 million) PAM is generally used as a suspending agent for long-fiber pulp papermaking. In papermaking, polyacrylamide is added through the wet end, and in order to exert the best effect, it should be kept in the paper as much as possible. [0003] It is generally believ...

Claims

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Application Information

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IPC IPC(8): G01N30/88
Inventor 王玉峰石葆莹欧海龙谷历文余伟梅
Owner GUANGDONG DONGGUAN QUALITY SUPERVISION TESTING CENT
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