Method for detecting chromium VI in cigarette paper by using an ion chromatographic separation- electrical conductivity detector

An ion chromatography and detector technology, which is applied in the field of ion chromatography separation-conductivity detector to detect hexavalent chromium in cigarette paper, achieves good practical application effect, simplifies the pretreatment process, and the method is fast and reliable.

Active Publication Date: 2013-01-16
CHINA TOBACCO HUNAN INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The ion chromatography-conductivity detection method for ci

Method used

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  • Method for detecting chromium VI in cigarette paper by using an ion chromatographic separation- electrical conductivity detector
  • Method for detecting chromium VI in cigarette paper by using an ion chromatographic separation- electrical conductivity detector
  • Method for detecting chromium VI in cigarette paper by using an ion chromatographic separation- electrical conductivity detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The tipping paper for a certain brand of cigarettes was collected according to the provisions of GB / T 450-1989 and YC / T 171-2002. Use clean scissors or cutters to cut the sample into fragments smaller than 1cm×1cm (the purpose is to extract fully and completely and reduce losses), and weigh about 1g of cigarette paper fragments into conical flasks (the glassware used should be brown Utensils, subject to analytically pure HNO before use 3 Wash with deionized water several times); accurately add 20mL 50mmol / L NaOH (diluted with deionized water), and plug the stopper. Extract by HY-2 oscillator at a speed of 160~180r / min for 2 hours, take the extract and pass it through a 0.45μm water filter membrane, collect the filtrate (remove the first 5 drops of filtrate), put it into a 2mL chromatographic injection vial for IC analysis . The ion chromatographic conditions are: the chromatographic analysis column is Diane’s AS11-HC anion exchange column (250mm×4mmi.d.), the guard ...

Embodiment 2

[0028] Using 50mmol / L NaOH as solvent, configure a series of standard solutions according to the concentration ranges of 0ppb, 4ppb, 8ppb, 16ppb, 25ppb, and 40ppb, and then carry out IC analysis and detection under the above experimental conditions. The peak area of ​​the component on the chromatogram is the response signal. 3 parallel measurement results of the standard solution, using the external standard method to establish a standard curve, the linear relationship of the standard curve is 0.9986, indicating that the response signal has a significant linear correlation with the component concentration; the standard solution with a concentration of 4ppb is diluted multiple times According to 3 times of the standard deviation of the results of 10 parallel determinations of the dilutions, the detection limit of the method is determined, and the detection limit is 0.024ppb, which shows that the detection limit of the method is low and the method is sensitive; 10 groups of cigare...

Embodiment 3

[0038] Using US Environmental Protection Agency certification method 3060A (method 7199# for the instrument) as the first method, and the method of the present invention as the second method, the detection of Cr(Ⅵ) in the inner lining paper of cigarettes is carried out.

[0039] The two methods are compared as shown in Table 4:

[0040] Table 4: Comparison of two methods

[0041]

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Abstract

The invention discloses a method for detecting Cr (VI) in cigarette paper by using an inhibition electrical conductivity detector characterized by ion chromatographic separation and large volume sample injection. The method comprises the specific steps as follows: shearing a cigarette paper sample into pieces, and accurately weighing cigarette paper pieces into a container; adding an extracting solution for vibrating extraction, and filtering the extracting solution by an aquo-system filter film, so as to obtain a to-be-detected solution; preparing a Cr (VI) standard solution, and testing and establishing a standard curve; and moreover, passing a filter liquor through an ion exchange column, and after isocratic elution, adopting the inhibition electrical conductivity detector and the ion chromatograph for analysis. According to the invention, as the large volume sample-injection electrical conductivity detector is adopted for detection, the derivation step is avoided, the preliminary treatment process is simplified, and the time, the labor and the materials for detection are saved; and further, the method can efficiently detect Cr (VI) in the cigarette paper, is rapid and reliable, is simple and convenient and easy to carry out, and fills the technical void in detecting Cr (VI) in the cigarette paper directly by the ion chromatography.

Description

technical field [0001] The invention relates to a method for detecting hexavalent chromium in cigarette paper with an ion chromatographic separation-conductivity detector. Background technique [0002] Chromium is a harmful heavy metal that exists in the form of Cr(Ⅲ) and Cr(Ⅵ). The chromium in cigarette paper comes from impurities introduced by papermaking raw materials, inks, pigment additives, etc. For a long time, the detection of cigarette paper The chromium of medium and heavy metals is the total chromium detected, and there is no special detection requirement for hexavalent chromium. However, hexavalent chromium is very toxic, and it is swallowed poison / inhalation poison, and skin contact may cause sensitivity; it is more likely to cause hereditary gene defects, may cause cancer if inhaled, and has a persistent danger to the environment. But these are the characteristics of hexavalent chromium, chromium metal, trivalent or tetravalent chromium do not have these toxic...

Claims

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Application Information

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IPC IPC(8): G01N30/96
Inventor 庹苏行戴云辉龚淑果杨华武吴名剑钟科军
Owner CHINA TOBACCO HUNAN INDAL CORP
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