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Method for detecting total mercury, inorganic mercury and organic mercury in tobacco simultaneously and application

A technology of inorganic mercury and organic mercury, applied in the field of simultaneous detection of total mercury, inorganic mercury and organic mercury in tobacco, to achieve the effect of simple instrument, easy popularization, high accuracy and sensitivity of results

Active Publication Date: 2015-07-15
CHINA TOBACCO GUANGDONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for simultaneous detection of total mercury, inorganic mercury and organic mercury in tobacco, without the need for morphological separation, Only one sample pretreatment is required to detect total mercury, inorganic mercury and organic mercury in tobacco

Method used

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  • Method for detecting total mercury, inorganic mercury and organic mercury in tobacco simultaneously and application
  • Method for detecting total mercury, inorganic mercury and organic mercury in tobacco simultaneously and application
  • Method for detecting total mercury, inorganic mercury and organic mercury in tobacco simultaneously and application

Examples

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Embodiment 1

[0037] This embodiment provides a method for simultaneously detecting total mercury, inorganic mercury and organic mercury in tobacco. The schematic diagram of the detection route is shown in the attachment. figure 1 As shown, including the following steps:

[0038] S1. Sample pretreatment: the tobacco sample is ground and passed through a 40-mesh sieve to obtain the sample to be tested. Accurately weigh 0.2g of the sample to be tested in a 15mL centrifuge tube, add 10.00mL of 5mol / L hydrochloric acid as the extraction solution, shake well and soak overnight (8-12 hours). Then it was extracted with 40kHz, 100W ultrasonic for 30min, and centrifuged at 4000r / min for 30min, the supernatant was obtained after passing through a 0.45μm water filter membrane to obtain the filtered supernatant for use;

[0039] S2. Detect the mass fraction of inorganic mercury:

[0040] Take 3.00mL of the filtered supernatant obtained from S1 in a 10mL colorimetric tube, add 0.5mL n-propanol to eliminate b...

Embodiment 2

[0054] This embodiment provides a method for simultaneously detecting total mercury, inorganic mercury and organic mercury in tobacco. The schematic diagram of the detection route is shown in the attachment. figure 1 As shown, including the following steps:

[0055] S1. Sample pretreatment: the tobacco sample is ground and passed through a 40-mesh sieve to obtain the sample to be tested. Accurately weigh 0.2g of the sample to be tested in a 15mL centrifuge tube, add 15.00mL of 4mol / L hydrochloric acid as the extraction solution, shake well and soak overnight. Then it was extracted by 40kHz, 100W ultrasonic for 40min, and centrifuged at 4000r / min for 30min. The supernatant was obtained after passing through a 0.45μm water filter membrane to obtain the filtered supernatant for use;

[0056] S2. Detect the mass fraction of inorganic mercury:

[0057] Take 1.5 mL of the filtered supernatant obtained from S1 in a 10 mL colorimetric tube, add 0.5 mL of n-propanol to eliminate bubbles, an...

Embodiment 3 application example 1

[0064] Determination of Organic Mercury in Raw Tobacco Leaf Samples: The method of the present invention was applied to the determination of total mercury, inorganic mercury and organic mercury content in 5 raw tobacco leaf samples used by this application unit. As a result, no inorganic mercury and organic mercury were detected.

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Abstract

The invention discloses a method for detecting total mercury, inorganic mercury and organic mercury in tobacco simultaneously and an application. One-time sample pretreatment is combined with cold vapor generation-atomic fluorescence spectrometry in the same detection condition for detecting the mass fraction of inorganic mercury and detecting the mass fraction of total mercury respectively, and the mass fraction of organic mercury is obtained by calculation, so that the content of total mercury, inorganic mercury and organic mercury in tobacco can be detected simultaneously by one-time sample pretreatment. The invention provides a simultaneous analysis detection scheme of mercury at different states in tobacco, the accurate detection result of total mercury, inorganic mercury and organic mercury can be obtained without form fractionation, and based on the method provided by the invention, the form distribution of mercury in tobacco can be reflected subjectively. The method is simple and convenient to operate, is high result accuracy and flexibility, and is wide in linear wide; the used instrument is simple and is easy to popularize.

Description

Technical field [0001] The present invention relates to the technical field of analysis of inorganic elements in tobacco, and more specifically, to a method and application for simultaneously detecting total mercury, inorganic mercury and organic mercury in tobacco. Background technique [0002] Mercury has three valence states: zero valence, positive monovalent and positive divalent, and it can form compounds of various forms with various organic and inorganic ligands. The order of the toxicity of different forms of mercury from strong to weak is organic mercury, inorganic mercury, and elemental mercury. Plants mainly contain inorganic mercury (Ⅱ) and organic mercury, of which organic mercury is methyl mercury (CH 3 Hg + ) And ethyl mercury (C 2 H 5 Hg + ) Mainly. [0003] At present, there have been many technical reports on the method for determining the total amount of mercury in tobacco, but there is no report on the speciation analysis method of mercury in tobacco. [0004] S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 古君平胡静施文庄胡玉玲李攻科
Owner CHINA TOBACCO GUANGDONG IND
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