Unlock instant, AI-driven research and patent intelligence for your innovation.

A Microflow Method for Measuring Total Nitrogen in Tobacco

A nitrogen content, microfluidic technology, applied in the microfluidic field, can solve the problems of peak shape drift, large consumption of reagents, and large consumption of reagents, and achieve high accuracy and precision, saving reagent consumption, and reducing reagent consumption. Effect

Active Publication Date: 2018-06-12
YUNNAN TOBACCO QUALITY SUPERVISION MONITORING STATION
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing more than 10 kinds of continuous flow analysis methods have exposed some shortcomings in the application: ①The internal diameter of the pump tube and glass coil is too large, which leads to serious diffusion effect in the tube, which makes the baseline too high and the peak shape drift during the sample measurement process. The emergence of instability and other phenomena will affect the accuracy of the measurement results; ②The high flow rate in the tube makes the consumption of reagents large, and consumes a large amount of reagents when a large number of samples are injected, which increases the workload of reagent preparation for staff
These defects have been puzzling the researchers of the tobacco quality inspection agency, but there is still no good solution in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Microflow Method for Measuring Total Nitrogen in Tobacco
  • A Microflow Method for Measuring Total Nitrogen in Tobacco
  • A Microflow Method for Measuring Total Nitrogen in Tobacco

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1 Experimental reagents, instruments and methods

[0043] 1.1 Main instruments and reagents

[0044] Tobacco component analysis standard substance GBW08514 (purchased from the National Tobacco Quality Inspection Center), Burley tobacco, oriental tobacco, flue-cured tobacco and cigarette samples were all from the raw material room of China Tobacco Yunnan Technology Center, and the thin slices were produced by China Tobacco Yunnan Reconstituted Tobacco Leaf Co., Ltd.

[0045] Sulfuric acid (98%), sodium chloride (NaCl), potassium sulfate (K 2 SO 4 ), copper sulfate (CuSO 4 ), potassium sodium tartrate tetrahydrate (KNaC 4 h 4 o 6 4H 2 O), disodium hydrogen phosphate (Na 2 HPO 4 12H 2 O), sodium hydroxide (NaOH), sodium salicylate (NaC 7 h 5 o 3 ), sodium nitroferricyanide (Na 2 Fe(CN) 5 NO·5H 2 O), sodium dichloroisocyanurate (C 3 Cl 2 N 3 o 3 Na), sodium hypochlorite (NaClO), all of the above reagents were of analytical grade, purchased from Guangzhou...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a micro-flow method for measuring total nitrogen content of tobacco. The flow path structure and process parameters of a conventional continuous flow analyzer are modified, including: arranging an air accelerating pipe, changing the inner diameter of a glass coil, changing the inner diameter and flow rate of a pump pipe and adopting a novel reagent preparation method, so that performance optimization is realized, and the using amount of the reagent is saved to the maximum extent. The method runs stably, and the problems of baseline raising, peak pattern drifting and the like do not occur after 60 cups of samples are fed at one time. The micro-flow method has the advantages of high analysis speed (60 samples per hour), high accuracy and high precision, contributes to reduction of reagent consumption, and is suitable for measuring total nitrogen in tobacco and tobacco products on a large scale.

Description

technical field [0001] The invention belongs to the technical field of tobacco chemical component detection, and in particular relates to a micro-flow method for rapidly and accurately detecting the total nitrogen content in tobacco and its products by using a continuous flow analyzer. Background technique [0002] The total nitrogen content in tobacco is one of the important indicators of tobacco quality evaluation, and has a great influence on the sensory quality of cigarettes. When the total nitrogen content is high, the smoke tends to be more irritating and the aroma quality is poor, while when the total nitrogen content is low, the smoke is generally not strong enough. There is also a close correlation between the total nitrogen content in tobacco and other nitrogen-containing compounds. Therefore, accurate determination of the total nitrogen content in tobacco is of great significance for understanding the characteristics of nitrogen-containing compounds and controllin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N35/00
CPCG01N35/00
Inventor 王春琼彭丽娟李苓王淑华张燕陈丹李素华
Owner YUNNAN TOBACCO QUALITY SUPERVISION MONITORING STATION