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Determination method of chromium elements, nickel elements, arsenic elements, selenium elements, cadmium elements and lead elements in Snus

A determination method and technology of snus, which is applied to the determination of arsenic, chromium, nickel, lead elements in snus, cadmium and selenium, and can solve the problems that the determination cannot be realized at the same time and the processing operation is cumbersome.

Active Publication Date: 2016-07-20
SHANGHAI TOBACCO GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the detection methods in these standards mainly include graphite furnace atomic absorption spectrometry, hydride atomic fluorescence spectrometry, colorimetry, and single-scan polarography. Determination of selenium, cadmium and lead content, and so far there is no relevant test to prove whether these methods are suitable for the determination of chromium, nickel, arsenic, selenium, cadmium and lead in snus

Method used

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  • Determination method of chromium elements, nickel elements, arsenic elements, selenium elements, cadmium elements and lead elements in Snus
  • Determination method of chromium elements, nickel elements, arsenic elements, selenium elements, cadmium elements and lead elements in Snus
  • Determination method of chromium elements, nickel elements, arsenic elements, selenium elements, cadmium elements and lead elements in Snus

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Experimental program
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Effect test

Embodiment 1

[0058] 1. Measurement method

[0059] 1.1 Sample pretreatment

[0060] Accurately weigh the snus sample and place it in a microwave digestion tank with an accuracy of 0.1 mg, and then add the digestion agent into the microwave digestion tank. Wherein, the solid-liquid ratio of the added weight of the snus sample to the added volume of the digestion agent is: 0.03-0.15:1 (g / ml). The digestion agent is a mixed aqueous solution of nitric acid, hydrogen peroxide and hydrofluoric acid, specifically 5-12ml60-65% nitric acid, 2-6ml20-30% hydrogen peroxide, 1ml30-40% hydrofluoric acid, preferably 5- 10ml65% nitric acid, 2-4ml30% hydrogen peroxide, 1ml40% hydrofluoric acid. Seal the digestion tank and place it in a microwave digestion instrument.

[0061] Set the heating program for the microwave digestion method, specifically: the initial temperature is room temperature (20-25°C), rise to 90-110°C with a heating time of 4-6min, and keep for 4-6min; then use a heating time of 4-6min...

Embodiment 2

[0075] 1. Measurement method

[0076] 1.1 Sample pretreatment

[0077] Accurately weigh the snus sample and place it in a microwave digestion tank with an accuracy of 0.1 mg, and then add the digestion agent into the microwave digestion tank. Wherein, the solid-liquid ratio of the added weight of the snus sample to the added volume of the digestion agent is: 0.04-0.07:1 (g / ml). The digestion agent is a mixed aqueous solution of nitric acid, hydrogen peroxide, and hydrofluoric acid, specifically 5ml of 65% nitric acid, 2ml of 30% hydrogen peroxide, and 0.5ml of 40% hydrofluoric acid, which are placed in a microwave digestion apparatus.

[0078] Set the heating program for the microwave digestion method, specifically: the initial temperature is room temperature (20-25°C), and the temperature is raised to 100°C with a heating time of 5 minutes, and kept for 5 minutes; then raised to 130°C with a heating time of 5 minutes, and kept for 5 minutes; Then raise the temperature to 16...

Embodiment 3

[0096] 1. Results and discussion

[0097] 1.1 Selection of digestion solution

[0098] Add snus samples to the blank solution, respectively choose digestion agent 1: 65% nitric acid, 30% hydrogen peroxide, 40% hydrofluoric acid (volume ratio is 10:4:1); digestion agent 2: 65% nitric acid , 30% hydrogen peroxide (volume ratio 5:2); digestion agent 3: 65% nitric acid, 30% hydrogen peroxide, 35% hydrochloric acid (volume ratio 5:2:1). Perform microwave digestion according to the conditions specified in 1.1 of Example 2, and cool, transfer, and constant volume to obtain a sample solution. At the same time, a blank experiment was carried out according to the conditions specified in 1.1 of Example 2 to obtain a blank solution. According to the standard solution and the internal standard solution of 1.2 in Example 2, finally use ICP-MS to detect respectively. From the comparison in Table 4, it can be seen that when the digestion agent 1 is selected, the detection results of the si...

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Abstract

The invention provides a determination method of chromium elements, nickel elements, arsenic elements, selenium elements, cadmium elements and lead elements in Snus. The determination method comprises the following steps: (1) performing sample pretreatment: weighing Snus samples, performing resolution by a microwave resolution method, then performing cooling and transferring, and setting a volume so as to obtain a sample solution; (2) preparing a standard liquid: preparing an internal standard solution of germanium <72>, indium <115> and bismuth <209>, and a standard solution of chromium elements, nickel elements, arsenic elements, selenium elements, cadmium elements and lead elements; (3) separately performing detection on the sample solution, the standard solution and the internal standard solution with an inductively coupled plasma mass spectrometer, and performing quantitation with an internal standard synchronous standard curve method so as to obtain the content of the chromium elements, the content of the nickel elements, the content of the arsenic elements, the content of the selenium elements, the content of the cadmium elements and the content of the lead elements in the sample solution. According to the determination method of the chromium elements, the nickel elements, the arsenic elements, the selenium elements, the cadmium elements and the lead elements in the Snus, provided by the invention, correlation coefficients, the recovery rate and the repeatability are good, and effective quantitative determination and control of relevant technical staff in tobacco trade on the content of six kinds of heavy metal elements in the Snus are facilitated.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection, and in particular relates to a method for determining chromium, nickel, arsenic, selenium, cadmium and lead elements in snus. Background technique [0002] Chromium, nickel, arsenic, selenium, cadmium, and lead are common heavy metal elements, and are also harmful components listed in the Hoffmann list in the tobacco industry. In recent years, they have received extensive attention due to their greater harm to humans and the environment. and research. Snus is a new type of smokeless tobacco product made by mixing tobacco powder with an appropriate amount of flavoring substances, salt (sodium chloride), water, humectant, and buffer agent (sodium carbonate) through heat treatment. When snus is taken, the snus is directly put into the human mouth, and the chromium, nickel, arsenic, selenium, cadmium, and lead elements in its raw materials and packaging materials will be abso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/44G01N27/626
CPCG01N1/44G01N27/62
Inventor 陆怡峰李永霞张珲姿姚鹤鸣顾文博刘鸿张怡春
Owner SHANGHAI TOBACCO GRP CO LTD
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