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HPLC-MSD를 이용한 식육 중 합성항균제의 동시분석
홍인석 ( In Suk Hong ),최윤화 ( Yoon Hwa Choi ),권택부 ( Taek Boo Kwon ),이정학 ( Jung Hark Lee ) 한국가축위생학회 2006 韓國家畜衛生學會誌 Vol.29 No.3
This study was conducted to develop the analytical method about simultaneous determination for synthetic antimicrobials in muscle by high performance liquid chroma-tography-mass selective detector(HPLC-MSD). Solid phase extraction(SPE), matrix solid phase dispersion(MSPD) and liquid-liquid extraction(LLE) have been adapted as pretreatment procedures for HPLC-MSD. Among various solvent tested, methanol was chosen for extraction of synthetic antimicrobials in muscles. For the optimized response, the values of various MS parameters including fragment voltage, drying gas flow, nebulizer pressure, drying gas temperature were verified. The average recovery rates using MSPD and SPE for muscles of bovine and pork were 78.9-127.1% and 78.3-121.7%, respectively. This method was verified the satisfactory performance for fourteen synthetic antimicrobials excepting carbadox in muscle of pork as detection limit of 0.05 ㎍/g on API/ES SIM mode.
Gas chromatograph-mass selective detector를 이용한 식육 중 잔류농약의 동시분석
홍인석 ( In Suk Hong ),최윤화 ( Yoon Hwa Choi ),권택부 ( Taek Boo Kweon ),이정학 ( Jung Hark Lee ) 한국가축위생학회 2005 韓國家畜衛生學會誌 Vol.28 No.3
This study was conducted to investigate the extraction method for the determination of organochlorine, organophosphorus and synthetic pyrethroid pesticide residues in beef fat by gas chromatography-mass selective detector(GC-MSD). Twenty one pesticide residues in fat were determined using a simple and rapid procedure based on solid-phase extraction(SPE) clean-up cartridges with octadecyl(C18)-bonded porous silica, florisil, 10% deactivated florisil, a tandem C18 and florisil and a tandem C18 and 10% deactivated florisil. Solvent-solvent extraction using acetonitrile was not satisfied to eliminate fat interference for pesticide residue analysis by GC-MSD, and the recoveries of the method in fat ranged from 16.2 to 57.3% except DDT(83.2%). The recoveries of SPE methods using a tandem C18 and Florisil was 59.6~123.8% except fenitrothion(135.2%), the SPE method was verified the satisfactory performance of pre-treatment for pesticide residues analysis in fat by GC-MSD. The efficiency of florisil deactivated with 10% water has been not proved significantly on recoveries of pesticide residues in fat.
시판 식육가공품(햄류, 소시지류 등)에 대한 최근 4년간(2000-2003) 아질산이온 함량
함희진 ( Hee Jin Ham ),홍인석 ( In Suk Hong ),임홍규 ( Hong Kyu Lim ),양윤모 ( Yoon Mo Yang ),최윤화 ( Yoon Hwa Choi ),김창기 ( Chang Gi Kim ),권택부 ( Taek Boo Kweon ),이정학 ( Jung Hark Lee ) 한국가축위생학회 2004 韓國家畜衛生學會誌 Vol.27 No.2
Contents of nitrites was tested in 2,290 meat products during 2000-2003, in Seoul by Diazoa method. It was detected over 40 ppm NO2 contents in 20 hams, 7 sausages, one bacon, and one crushed meat product respectively. Also, over 20ppm nitrites was 21.8%(240/1,103) in hams, 20.7%(122/589) in sausages, 6.8%(14/205) in crushed meats, and in 6.0%(5/83) bacons respectively. In case of average contents and contents range, 0.012 g/kg, ND-0.116 g/kg in hams, 0.012 g/kg, ND-0.066 g/kg in sausages, 0.010 g/kg, 0.001-0.089 g/kg in bacons, and 0.006 g/kg, ND-0.040 g/kg in crushed meats etc. Specially, in sausages, it was increased continually by years, in not only average nitrites contents but also their contents range, also, in case of bacons, increased continually by years on only average nitrites contents. According to results, the NO2 contents monitoring for the processed meat products must be reinforced to supply safety food for the citizens.
최효정 ( Hyo Jung Choi ),홍인석 ( In Suk Hong ),최윤화 ( Yoon Hwa Choi ),이윤희 ( Youn Hui Lee ),김창기 ( Chang Gi Kim ),이덕주 ( Duck Joo Lee ),이정학 ( Jung Hark Lee ) 한국가축위생학회 2007 韓國家畜衛生學會誌 Vol.30 No.3
This study was carried out to investigate the sorts and the quantity of preservatives in 2,575 samples of 10 kind products which had been sold in the markets from 2004 to 2006. These analyses were done using HPLC. By the result of investigation, the most frequently detected preservative was sorbic acid in 222 cases. Detection rate of sorbic acid was 8.62%. Dehydroacetic acid(DHA) was detected in 8 cases among 36 butter samples and one of 278 sausage samples. Detection rate of DHA was 0.0035%. In detail, the detection rate was 71.5%(88/123) in dried meat, 22.2%(8/36) in processed butter, 17.3%(48/278) in sausage, 10.4%(17/163) in canned meat etc., 7.9%(49/619) in ham, 7.48%(19/254) in processed cheese and 4%(2/49) in bacon, respectively. The content range of sorbic acid and its average in each of the processed meat and milk products are as follows: ND~1.64g/㎏, 0.26 g/kg in dried meat, ND~1.34g/㎏, 0.114g/㎏ in sausage, ND~0.41g/㎏, 0.015g/㎏ in canned meat etc., ND~1.37g/㎏, 0.038g/㎏ in ham, ND~1.63g/㎏, 0.056g/㎏ in processed cheese, ND~0.57g/㎏, 0.022g/㎏ in bacon, respectively. Amount of detected DHA was less than 0.23 g/kg, and its average was 0.022 g/kg in processed butter.