CN102226747A

CN102226747A - Method for detecting ash content of tobacco

Info

Publication number: CN102226747A
Application number: CN 201110065574
Authority: CN
Inventors: 廖臻; 王岚; 蒋次清; 徐世涛; 马燕; 冯文; 孙桂芬; 杨帅; 芮晓东; 曹红云
Original assignee: Yunnan Academy of Tobacco Science
Current assignee: Yunnan Academy of Tobacco Science
Priority date: 2011-03-18
Filing date: 2011-03-18
Publication date: 2011-10-26

Abstract

The invention relates to a method for detecting the ash content of tobacco, which belongs to the technical field of tobacco analysis and detection. The method specifically comprises the following steps: weighing a certain amount (correct to 0.0002g) of crushed tobacco samples with fineness of 30 meshes; putting the crushed tobacco samples into a quartz fiber crucible, firing the crushed tobacco samples in a microwave muffle furnace for 20 minutes at a temperature of 500 DEG C, then taking out the fired tobacco samples and cooling the fired tobacco samples to room temperature in a dryer, accurately weighing; and subtracting the water content of the tobacco from the weight of the tobacco to obtain the ash content of the tobacco. The method provided by the invention is simple and has the characteristics of low cost, high efficiency, accurate data analysis, safe operating environment, and capability of reducing harms to operators.

Description

One grow tobacco in the detection method of ash content

Technical field:

The present invention relates to one grow tobacco in the detection method of ash content, belong to the tobacco technical field of analysis and detection.

Background technology:

The tobacco ash content is a remaining material after the result of combustion of tobacco, mainly based on inorganic oxide and salt, the height of its content has direct relation with the tobacco leaf flammability, be significantly or utmost point remarkable negative correlation with fragrance matter, perfume quantity, assorted gas, the total points of smokeing panel test, pungency and pleasant impression, it is one of major criterion of weighing tobacco quality, dissimilar tobacco ash content differ greatly, burley tobaccos and Maryland ash content are the highest, reach 20%, the flue-cured tobacco ash content is minimum, generally ± 10%, the Turkish tobaccos ash content is placed in the middle, ± 15%.Therefore, measure the tobacco ash content particular importance that seems.

Traditionally, the method for measuring the tobacco ash content all is to adopt the dry ashing gravimetric method, and method is accurately classical, and error is little, but also exists operation steps loaded down with trivial details, the shortcoming of length consuming time.Traditional muffle furnace method needed one hour even the longer time; And do not have automatic emptying system, there is potential safety hazard in the operator.

Summary of the invention:

The object of the invention is to overcome the deficiency of prior art, and a kind of method is simple, cost is low, efficient is high and the assay method of the accurate tobacco ash content of analysis data and provide.

The present invention utilizes microwave Muffle furnace, has set up the analytical approach of ash content in tobacco and the goods thereof, and its concrete operations step is as follows:

A. the fineness that takes by weighing a certain amount of 0.0002g of being accurate to is that 30 purpose tobaccos are pulverized sample;

B. tobacco sample is put into the quartz fibre crucible, 500 ℃ of calcination 20min in microwave Muffle furnace;

C. taking-up is accurately weighed after being placed on and being cooled to room temperature in the exsiccator;

D. calculate ash content by following formula:

As % = \overset{&OverBar;}{\begin{matrix} (M_{2} - M_{0}) \times 100 \\ (M_{1} - M_{0}) \times (1 - w) \end{matrix}}

Wherein: the percentage composition of As-ash content;

The weight of sample and quartz fibre crucible before the M1-ashing, the g of unit;

M2---the weight of sample and quartz fibre crucible after the ashing, the g of unit;

M0---the weight of crucible after the constant weight, the g of unit;

The moisture content percentage composition of W---sample.

Characteristics of the present invention are: method is simple, cost is low, efficient is high and it is accurate to analyze data; Working environment safety has reduced the harm to operating personnel.

Embodiment:

The equipment that this method adopts is market and buys.The concrete operations step of method is as follows:

1. tobacco sample ashing treatment

Tobacco sample after pulverize, crossing 30 mesh sieves, is accurately taken by weighing 1g (being accurate to 0.0002g) sample and places the quartz fibre crucible, and 500 ℃ of calcination 20min in microwave Muffle furnace accurately weigh after taking-up places exsiccator to be cooled to room temperature.

2. calculating ash content:

As % = \overset{&OverBar;}{\begin{matrix} (M_{2} - M_{0}) \times 100 \\ (M_{1} - M_{0}) \times (1 - w) \end{matrix}}

Wherein: the percentage composition of As-ash content;

M0---the weight of crucible after the constant weight, the g of unit;

The moisture content percentage composition of W---sample.

3, comparative test result

Get four samples respectively 1,2,3, No. 4, handle as stated above, handle this 4 samples with the method for traditional muffle furnace simultaneously, the results are shown in following table.

Two kinds of method measurement results relatively

It is close to measure the result of ash content in the tobacco with two kinds of methods as can be known from table, can substitute ash content in traditional muffle furnace mensuration tobacco and the goods thereof with microwave Muffle furnace fully.

Practical application shows: utilize the ash content in microwave Muffle furnace mensuration tobacco and the goods thereof, can save the sample carbonization process, directly ashing, and calcination time foreshortens to 20min by the 60min of traditional muffle furnace, cooling velocity is fast, only need 6s promptly to be cooled to room temperature after ashing is finished, analysis efficiency is high and the analysis data are accurate.

Claims

One grow tobacco in the detection method of ash content, it is characterized in that the concrete steps of the detection method of ash content in the tobacco are as follows:

D. the fineness that takes by weighing a certain amount of 0.0002g of being accurate to is that 30 purpose tobaccos are pulverized sample;

E. tobacco sample is put into the quartz fibre crucible, 500 ℃ of calcination 20min in microwave Muffle furnace;

F. taking-up is accurately weighed after being placed on and being cooled to room temperature in the exsiccator;

D. calculate ash content with following formula:

$As % = \frac{(M_{2} - M_{0}) \times 100}{(M_{1} - M_{0}) \times (1 - w)}$

Wherein: the percentage composition of As-ash content;

The weight of sample and quartz fibre crucible before the M1-ashing, the g of unit;

M2---the weight of sample and quartz fibre crucible after the ashing, the g of unit;

M0---the weight of crucible after the constant weight, the g of unit;

The moisture content percentage composition of W---sample.