Effective and reusable monolith capillary trap of nitrosamine extraction by superheated water from frankfurter sausage.
A novel, simple, rapid, and inexpensive method of extraction and cleanup of nitrosamines from frankfurter sausage was achieved with a capillary filled with monolith of either polystyrene-co-divinylbenzene (PS-DVB), Polydivinylbenzene (P-DVB), or silica that had been fabricated. The study of capability in trapping nonpolar matrix and monolith capillaries with varied lengths revealed that a silica monolith gave the best result for nitrosamine determination. With an online coupling between superheated water extraction (SWE) and silica monolith capillary connected to a 5% phenyl-methylpolysiloxane column, factors affecting the extraction and determination, namely, sensitivity with and without the monolith, reusability, injection-injection repeatability, capillary-capillary precision, and chromatographic separation, were investigated. This confirmed the feasibility of the method. The optimal length of silica monolith capillary was 30 mm, offering reuse more than 20 times. Separation and quantification of selected volatile nitrosamines were carried out using gas chromatography (GC) coupled with either a flame ionization detector (FID) or mass spectrometer (MS). The overall extraction and determination method determined by GC-MS allowed for a recovery of 75-88% with a <5% relative standard deviation (RSD) and detection limit of 2-5 ng of injected nitrosamine.
Department of Chemistry and the Center of Excellence for Innovation in Chemistry, Faculty of Science, Kasetsart University , Post Office Box 1011, Chatuchak, Bangkok 10903, Thailand.
Orapin
O
Chienthavorn
Narumol
N
Ramnut
Panee
P
Subprasert
Anupop
A
Sasook
Wimonrut
W
Insuan
D002197:Capillary Action; D002849:Chromatography, Gas / Q000379:methods; D017743:Equipment Reuse; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006358:Hot Temperature; D008461:Meat Products / Q000032:analysis*; D009602:Nitrosamines / Q000032:analysis* / Q000302:isolation & purification; D012822:Silicon Dioxide; D014867:Water / Q000737:chemistry*
D009602:Nitrosamines; D014867:Water; D012822:Silicon Dioxide