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RISS 인기검색어
- 검색키워드
- 저자 : 박준조 ( Jun Jo Bark ) (검색결과 4 건)
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박준조 ( Jun Jo Bark ),금모래 ( Mo Rae Keum ),고광춘 ( Kwahng Choon Koh ),박병옥 ( Byoung Ok Park ),이성식 ( Sung Sik Lee ) 한국가축위생학회 2002 韓國家畜衛生學會誌 Vol.25 No.1
A method was developed to separate, detect and qualify aldicarb, bendiocarb, carbaryl, carbofuran, ethiofencarb, methomyl, methiocarb, propoxur in meats and fruits. Experimental beef and fork samples were fortified with 0.05mg/kg of carbamate pesticides for analysis. Carbamate-detected pear by HPLC fluorescence detector(HPLC/FLS) are extracted with acetonitril and refined by solid phase extraction(SPE) filled with aminopropyl-bonded silca, In the following step, the injected materials into LC/MS are analyzed to result in the fact that bendiocarb, carbaryl, carbofuran, ethiofencarb, methomyl, methiocarb, propoxur presents several sorts of fraction ions following with; [M+H]+, [M+Na]+, [M-CONHCH3]+, [M-OCONHCH3]+. In addition, ethiofencarb presents [M-SCH2CH3] ion distinctive and aldicarb presents [M+Na]+ and [M-OCONHCH3]+ ion which is the most decisive fraction ion for pesticides such as bendiocarb, carbaryl, carbofuran, ethiofencarb, methiocarb, methomyl, propoxur excluding [M+H]+ ion. However, [M-OCONHCH3]+ and [M-OCONHCH3]+ fraction ion charactering carbamate pesticides are detected most efficiently with fragment voltage 50eV. As a result, for quantitative analysis, [M+Na]+ ion is the most decisive ion for detection of aldicarb and [M+H]+ ion is the most decisive fraction ion for pesticides such as bendiocarb, carbaryl, carbofuran, ethiofencarb, methiocarb, methomyl, propoxur. Carbaryl-detected pear by HPLC/FLS are analyzed by LC/MS and the result shows that [M+H]+ and [M-CONHCH3]+ ions charactering carbaryl are detected.
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박준조 ( Jun Jo Bark ),육지혜 ( Ji Hea Youk ),김휴경 ( Hu Kyoung Kim ),박혜원 ( Hye Won Park ),김인경 ( In Kyung Kim ),이우성 ( Woo Seong Lee ) 한국가축위생학회 2007 韓國家畜衛生學會誌 Vol.30 No.3
This study was conducted two kinds of aims: 1) to modify the analytical methods(conditions) by high performance liquid chromatography-fluorescence detector for the detection of residual ivermectin in raw milk, 2) to provide basic information for the evaluation of standard of the residual ivermectin in raw milk. It could be considerable that negative ion spectra can be better method in the LC/MS analysis for the detection of residues. Characteristic daughter ions were observed in negative ion spectra, however, linear line was not formed in positive ion one. Three Holstein cows (500±10kg) were applied to commercial ointment of ivermectin just one time at the first day of test, and residues in raw milk were examined for 20day after administration. The limit of detection(LOD) was 0.65ng(n=5) by HPLC/FLD, and recovery rates were 87.85%~99.47%. The peak was observed at the 4th day, and residues lasted to the end. Thus ivermectin was prohibited when lactating.
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HPLC와 LC/MS에 의한 식육내 잔류 설파제의 동시 분석법
정봉수 ( Bong Su Jung ),박준조 ( Jun Jo Bark ),금모래 ( Mo Rae Gum ),김인경 ( In Kyoung Kim ),박병옥 ( Byoung Ok Park ),한정희 ( Jeong Hee Han ) 한국가축위생학회 2004 韓國家畜衛生學會誌 Vol.27 No.1
A multiresidual analysis was performed to determine 12 sulfonamides(sulfacetamide, sulfadiazine, sulfisomidine, sulfathiazole, sulfapyridine, sulfamerazine, sulfamethazine, sulfamonomethoxine, sulfisoxazole, sulfamethoxazole, sulfaquinoxaline, and sulfadimethoxine) in beef and pork simultaneously. The multiresidual analysis for the sulfonamides currently used was able to analyze 5 kinds of sulfonamides at the same time. The method of this 12 sulfonamides multiresidual analysis in this study was matrix solid-phase dispersion(MSPD) by high performance liquid chromatography(HPLC) and liquid chromatography mass spectrometry (LC/MS). The recovery rate of the materials was measured by MSPD method with 3 different extraction solvents; Dichloromethane, DCM: Ethylacetate(3:1), DCM: EA(9:1). Also, samples (84 beef and 205 pork samples) which were positive by EEC-4 plate test from 2001 to 2003 were tested to investigate the kinds of sulfonamides using HPLC. The results from the study were as follows; 1. The recovery rate of the materials was measured by MSPD method with 3 different extraction solvents; Dichioromethane, DCM Ethylacetate(3:1), DCM: EA(9:1). The method of extraction solvent with DCM: ethyl acetate(9:1) was the most excellent(87.7~99.3%) in separation and reappearance. 2. In the LC/MS analysis of sulfonamides, signal to noise ratio was showed relatively high in the positive mode and special ion in the quality analysis was determined via [M+H] and m/z 156. A spectrum of sulfonamides was showed from all 12 sulfonamides. 3. The samples positive by the EEC-4 plate, a screening test method, were categorized by sulfonamides through Charm 11 and confirmed the kinds of sulfonamides through HPLC. 1) Among 84 beef samples positive by EEC-4 plate, 20 samples were positive by Charm II and identified as 7 sulfamethazine, 9 sulfadimethoxine, 1 sulfamonomethoxine and 3 unknown status. 2) Among 205 pork samples positive by EEC-4 plate, 42 samples were positive by Charm II and identified as 19 sulfamethazine, 1 sulfadimethoxine, 4 sulfamonomethoxine and 5 unknown status.
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경기 남부지역 HACCP 인증 아이스크림 업체와 미인증 업체의 미생물 관리 수준 비교
배진규 ( Jin Gyu Bae ),전오숙 ( Oh Sook Jeon ),박혜원 ( Hye Won Park ),복민순 ( Min Soon Bok ),양호열 ( Ho Yul Yang ),박준조 ( Jun Jo Bark ),고태오 ( Tae Oh Ko ) 한국동물위생학회 2013 韓國家畜衛生學會誌 Vol.36 No.2
The hazard analysis critical control point (HACCP) system was introduced to the Korean livestock slaughter and product processing business in 1997. Ice cream manufacturers focus on the sterilization process in order to reduce microorganism, so the HACCP-accredited ice cream manufacturers particularly set the sterilization process as critical control point (CCP). Therefore, the microbiological test results on the finished products can be considered as one of the indicators which show the level of microbiological control in the ice cream manufacturers. Accordingly, this study was carried out to examine if there is a meaningful difference in terms of the microbiological control level between the HACCP-accredited and non-accredited ice cream manufacturer groups by comparing aerobic plate count (APC) of ice creams. The mean of APC was 1.68 Log CFU/g in the HACCP-accredited ice cream manufacturer group and 2.59 Log CFU/g in the non-accredited ones respectively and there was a statistically significant difference (P<0.05). The test results suggest that the level of microbiological control in the HACCP-accredited ice cream manufactures is much higher than that of non-accredited ones.
ScienceON
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