[Compound preservative and cyclamat determinated by gas chromatography].
OBJECTIVE
To establish a gas chromatography method for synchronous determination of six preservatives and cyclamat in cake and pastry.


METHODS
The pre-treatment of complicated compound was finished by dialysis cleaning technology. The interference of the complicated foundation body in the cake and pastry was removed by the best dialysis condition: 2 g/L NaOH of dialysis fluid was dialyzed at the temperature of 25 degrees C for 24h, and the six preservatives and cyclamat (sorbic acid, benzoic acid, dehydroacetic acid, ethylparabenum, propylparabenum, butylparabenun and sodium cyclamate) were synchronously seperated by 60-80 mesh Chromosorb WAW DMCS glass packing column of intercoated 5% DEGS + 1% H3 PO4.


RESULTS
The seven components in the sample had a good lining relation at the concentration 100 -5000 mg/L when the external standard method was used, and their correlation coefficients were 0.9993-0.9998, and their average recovery rates were 87.5%-101.9%, and their relative standard deviations were 0.64%-3.3%, and detection limits were 1.1-8.8 mg/L.


CONCLUSIONS
This method could be used to quickly analyse the compound preservatives of the large batch cake and pastry through the common gas chromatography and packed column and this method was simple, accurate and quick.
Xin
Ruozhu
R
Meihekou Quality Supervision and Inspection Station of Product and Commodity, Meihekou 135000, China. mhkxrz@yahoo.com.cn
Ding
Mei
M
Zheng
Xianguang
X
Li
Yajuan
Y
D002849:Chromatography, Gas / Q000379:methods*; D003494:Cyclamates / Q000032:analysis*; D005520:Food Preservatives / Q000032:analysis*; D013549:Sweetening Agents / Q000032:analysis
D003494:Cyclamates; D005520:Food Preservatives; D013549:Sweetening Agents