Method for determining content of chromium in paper-making reconstituted tobacco

A technology for reconstituted tobacco leaves and chromium content, applied in measuring devices, color/spectral characteristic measurement, and material analysis through optical means, can solve the problems of high detection limit, cumbersome maintenance, low sensitivity, etc., and achieve convenient maintenance, Safe and efficient operation, the effect of meeting the detection requirements

Inactive Publication Date: 2017-11-21
SHANGHAI TOBACCO GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the flame atomic absorption method needs to use flammable and explosive gases such as acetylene, which lacks safety, has low sensitivity and high detection limit, and is not suitable for the determination of trace elements; the pretreatment of the HPLC method is cumbersome and is not suitable for batch Sample detection; the instruments used in ICP-AES and ICP-MS are expensive, cumbersome to maintain, and difficult to popularize; graphite furnace atomic absorption spectrometry has the advantages of high sensitivity and low detection limit. This method is used for the detection of chromium in paper and flavors and fragrances used in cigarettes
However, compared with the above samples, reconstituted tobacco has its particularity, and there is no literature report on the method of graphite furnace atomic absorption method for the determination of chromium in reconstituted tobacco

Method used

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  • Method for determining content of chromium in paper-making reconstituted tobacco
  • Method for determining content of chromium in paper-making reconstituted tobacco
  • Method for determining content of chromium in paper-making reconstituted tobacco

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] 1. Instruments and reagents: graphite furnace atomic absorption spectrometer. High-throughput closed microwave digestion instrument (equipped with TFM microwave digestion tank). Acid catcher. Plastic volumetric flask (50mL). Electronic balance (sensitivity 0.000 1g). Laboratory pure water meter. whirlwind mill. Electric blast drying oven. 1000μg / mL chromium standard solution, 10000mg / L palladium nitrate (excellent grade). 65% nitric acid (excellent grade). 37% hydrochloric acid (excellent grade). 40% hydrofluoric acid (excellent grade). Argon (99.999% pure). Ultrapure water (conductivity 18.2MΩ·cm).

[0084] 2. Sample treatment: Weigh a certain amount of reconstituted tobacco leaf samples, put them in an oven at 100-110°C to dry for 4 hours, crush them to 40 meshes, and place them in a desiccator for later use. Accurately weigh 0.2g of powdered reconstituted tobacco leaf sample, accurate to 0.0001g, place it in a 50mL microwave digestion tank, add 5mL of 65% ...

Embodiment 2

[0087] As described in Example 1, a reconstituted tobacco leaf sample with brand A was selected, and its chromium content was measured to be 1.82 mg / kg.

Embodiment 3

[0089] As described in Example 1, a reconstituted tobacco leaf sample with brand C was selected, and its chromium content was measured to be 3.74 mg / kg.

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Abstract

The invention discloses a method for determining the content of chromium in paper-making reconstituted tobacco. According to the method, a mixed acid system is used for microwave digestion of a sample; then acid is cleared up and a volume is fixed; palladium nitrate is used as a matrix modifier; Zeeman effect is employed for automatic elimination of a background; a graphite furnace atomic absorption spectrometer and the like are used for determination; so the content of chromium in the reconstituted tobacco sample can be accurately and rapidly detected. The method provided by the invention fills in a technical gap in detection of elemental chromium in reconstituted tobacco samples via a graphite furnace atomic absorption process; a temperature control system of a microwave digestion instrument can be intelligently adjusted, so the process of digestion is safe, efficient and easy to operate; related heating programs (including ashing temperature, atomization temperature, etc.) of the graphite furnace atomic absorption process are optimized directed at the special sample, i.e., reconstituted tobacco, so an added-standard recovery rate is high and determination results are accurate; sample pre-treatment is relatively simple; and the method has low detection limit and high sensitivity and can meet demands of detection of trace element chromium in reconstituted tobacco.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical inspection of reconstituted tobacco leaves, and mainly relates to the technical field of determination of heavy metal elements in reconstituted tobacco leaves, in particular to a method for directly measuring the chromium content in reconstituted tobacco leaves by a papermaking method by using a graphite furnace atomic absorption spectrometer. Background technique [0002] Studies have shown that chromium can enter the human body through the digestive system, skin and respiratory system, causing lung cancer and other diseases, and causing harm to the human body. Paper-making reconstituted tobacco leaves are obtained by mechanically processing wastes such as tobacco stems, chips and shreds produced in the cigarette production process (including threshing and redrying and tobacco leaf shredding) as raw materials, adding a certain proportion of tobacco accessories A semi-finished materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/3103
Inventor 赵东辉卢岚葛金元应佳骏
Owner SHANGHAI TOBACCO GRP CO LTD
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