author:seohtm Add the Time:2015-7-7 10:32:36 Click: 1655

1. Overview


   Increasing material life today, people increasingly value the safety of food, food packaging materials and remaining in the printing process brings ink solvent will seriously harm to human health, and therefore the packaging material of the organic The importance of solvent residues also increasingly attracted peoples attention and food manufacturers, paper, headspace and gas chromatography method to analyze conjunction food packaging materials in an organic solvent residue is simple, capable of continuous batch testing, sensitivity characteristics.


2. Keyword


   Headspace -GC organic solvent residues in food packaging material


3. Instrument


   Gas chromatograph: GC-1690 flame ionization detector (FID) N2000 workstation Headspace Sampler DK3001A


The analysis conditions


Chromatographic conditions
Injection volume: 1mL injection method: split (split ratio: 39: 1) Inlet temperature: 160 ℃
Column: DB-WAX, 30m × 0.25mm × 0.25μm oven temperature: 70 ℃ (5min)
Carrier gas: N2, stigma pressure: 85kPa (constant) Detector: FID temperature: 160 ℃ makeup flow: 30mL (N2)
Headspace Conditions
Equilibrium temperature: 80 ℃, equilibrium time: 10min transfer line temperature: 85 ℃
Carrier gas: N2, pressure: 90kPa, assisting pressure: 60kPa pressing time: 30s


5. Sample Preparation


(1) a certain area of ​​food packaging materials crushed by shredders.
(2) The sample is placed in 20mL headspace vials.
(3) Place the sample vial heated headspace injection.


6. Results and Discussion


   The results shown in FIG. 1, FIG. 1 is a standard four kinds of the solvent sample analysis results, Figure 2 for food use in a food factory
Analysis of the results of product bags.


7. The qualitative analysis results are as follows:


1.EA (ethyl acetate) 2.MEK (methyl ethyl ketone) 3.IPA (isophthalic acid) 4.TOL (toluene)



   As can be seen from the results of the analysis using headspace gas chromatography can detect this well four solvents, meet the national standard requirement of the analysis of such a sample, taken over the old oven heating, and the injection needle with airtight The method is easy to operate, the sample is simple, reproducible, high sensitivity.