Smokepack coating new 26 VOCs detection overview and corresponding configuration information - Shanghai Junqi Instruments

NT2S05-26-1.8V

The total length of the probe PAL75-Q1 straight four-claw full gold-plated test needle thimble is 33.35mm

Kaixin micro test

Test - lowercase jpg

In recent years, with the continuous improvement of people's consumption level, the tobacco industry has increased the packaging grade of cigarettes, and various high-grade tipping paper products with various gold, hot silver, multi-layer overprint patterns and letters have been widely used. Due to the complicated design of these high-grade tipping paper patterns, some organic solvents are used more or less in the printing process. Once the excess organic solvent in the tipping paper exceeds, it not only affects the smoking taste of cigarettes, but also harms the consumer's body. health. The volatile organic compounds in the tipping paper are mainly from the sizing materials and auxiliaries used in the production, the dilution solvents of various inks and auxiliaries, and the like.

therefore

The safety of cigarette packs has also received widespread attention within the tobacco industry.

As a special food, cigarettes are known to have a unique and relatively stable aroma and aroma. However, with the high-grade packaging of cigarettes, the printing process and printing process are becoming more and more complicated. The organic solvent used in the printing process remains in the cigarette packaging materials. Because the surface area of ​​the tobacco and cigarette filters is large, the VOCs are more Strong adsorption capacity, residual organic solvents can be transferred to cigarettes, which may change the style of cigarette products and absorb food quality; because most of the organic solvents used in the printing process are harmful to the human body, it may even harm consumers. Health.

Under this background, the National Tobacco Monopoly Bureau aims to reduce the impact of volatile organic compounds in tobacco packaging materials on the quality of cigarettes, and guide cigarette enterprises in the development of tobacco label design and production in the direction of green environmental protection and health and safety, combined with the actual situation in China. Organized and formulated and promulgated the tobacco industry standard YC/T207-2006 "Determination of Volatile Organic Compounds in Cigarette Strips and Box Packaging Paper by Headspace-Gas Chromatography", YC263-2008 "Volatilization in Cigarette Strips and Box Packaging Paper" Limits of organic organic compounds, used to detect and control the VOC content of cigarette packets.

Therefore, we should fully recognize the importance of implementing the industry standards, face the current grim situation with a positive attitude, and actively find ways to deal with it.

The industry standard YC/T207-2006 uses headspace-gas chromatography (HS-GC) to detect the content of cigarette VOCs. The biggest advantage of this method is that it does not require complex pretreatment of the sample, and directly takes the top air body. Analysis is simple and fast. The test equipment consists of a headspace instrument and a gas chromatograph. The headspace (HS) pretreats the sample (equal to 80 °C for 45 min) and takes the gas chromatograph as an injector. The gas chromatograph (GC) separates the sample. analysis.

The headspace analysis method is based on the equilibrium state, the composition of the top air phase is proportional to the composition of the original sample, and the content of each component in the sample is indirectly determined by measuring the content of each component in the head air phase. Specifically, at a certain temperature, the volatile components in the sample in the closed vessel have a distribution equilibrium between the gas phase and the condensed phase (the original state of the sample: liquid phase or solid phase), and the composition of the gas phase can reflect the condensation. The composition of the phase can reflect the original composition of the same component in the sample. When the two-phase equilibrium is reached, the gas phase is introduced into the gas chromatograph for separation and analysis, and the original content of each volatile component in the sample can be determined.

Gas chromatography uses different partition coefficients between the gas phase and the stationary phase of each component in the sample. When the vaporized sample is carried into the column by the carrier gas, the components are in between the two phases. Repeated distribution (adsorption-desorption-release). Because the adsorption capacity of the immobilized components is different (that is, the preservation effect is different), the components run at different speeds in the column. After a certain column length, they are separated from each other and sequentially leave the column and enter the detector. The resulting ion current signal is amplified and the peaks of the components are plotted on a recorder.

Headspace-Gas Chromatography (HS-GC) is used to detect the content of VOCs in cigarette packs. It is divided into two parts: qualitative analysis and quantitative analysis. Qualitative analysis solves the problem of “including no containment”. "The problem. Qualitative analysis is done by different components with different retention times (the time from when the sample component is separated from the start of the injection to the maximum concentration of the component after the column, and also from the start of the injection to the presence of a component The time elapsed since the apex of the chromatographic peak is usually expressed by tR); the quantitative analysis uses the external standard method--the standard curve method, which is based on the component concentration proportional to the peak area, with appropriate The solvent is configured with a series of different concentrations of the standard, and the concentration curve and the peak area curve are obtained by quantitative injection to obtain a standard curve. By analyzing the peak area of ​​the component to be tested in the unknown sample under exactly the same conditions, the corresponding content can be found from the curve.
The required instrument configuration is as follows: (Agilent 6890N with the same instrument A90)

product

name

specification

model

Metering

unit

Quantity

Cigarette pack

VOCs

Gas Chromatograph

A90

Type host with FID detector, capillary injection system (split / splitless)

,

Installation accessory kit

Workstation software

station

1

Headspace sampler

16

Station

Fully automatic

Headspace sampler

HS-16A with headspace accessory package

station

1

Column

Import from America

SpelcoVOCOl column 60m*0.32mm*1.8um

root

1

Nitrogen

40L high purity nitrogen and pressure reducing valve

station

1

Hydrogen generator

JQ-H300II high purity hydrogen generator

station

1

Air generator

JQ

-

61

Pure oil free

gas

generator

station

1

Gas purifier

JQ-GPI three gas path gas purifier

station

1

Reagent

Triacetin

Solvent 500ml / bottle

bottle

2

Sample

VOCs standard solution

2

6

Volatile component

set

1

computer

Lenovo brand machine

station

1