食品科学2011,Vol.32Issue(22):188-191,4.
罗非鱼肉中土臭素和2-甲基异莰醇的测定
Determination of Geosmin and 2-Methylisoborneol in Tilapia Meat
摘要
Abstract
An analytical method was established for determining geosmin(GEO) and 2-methylisoborneol(MIB) as off-odor compounds in freshwater fish using gas chromatography-mass spectrum(GC-MS) based on microwave assisted distillation followed by solid phase microextraction.Such sample preparation parameters as microwave power,distillation time and carrier gas flow rate were optimized to be 360 W(40% of the maximum power),6 min,and 60 mL/min,respectively.Under the optimized conditions,the detection limits were 0.044 μg/kg for GEO and 0.095 μg/kg for MIB.A good linearity was observed for GEO and MIB over the concentration range of 0.5 to 20 μg/kg with r2 of 0.998 and 0.991,respectively.The recoveries were 42.7% for GEO and 61.9% for MIB.Using this method,the contents of GEO and MIB in a commercially available tilapia meat sample were determined to be 4.97 μg/kg and 1.21 μg/kg,respectively.关键词
土腥味物质/微波蒸馏/罗非鱼/土臭素/2-甲基异莰醇Key words
off-flavor compounds/microwave-assisted distillation/tilapia/geosmin/2-methylisoborneol分类
农业科技引用本文复制引用
王国超,李来好,郝淑贤,杨贤庆,辛少平,岑剑伟,刁石强,黄卉,魏涯..罗非鱼肉中土臭素和2-甲基异莰醇的测定[J].食品科学,2011,32(22):188-191,4.基金项目
国家农业产业技术体系项目 ()
国家农业科技成果转化项目(2010GB23260577 ()
2009GB2E200303 ()
2010GB2E000335) ()
广东省科技计划项目(2009A020700004 ()
2008A020100006 ()
2009B020201003) ()
广东省海洋渔业科技推广项目(A200899B02 ()
A200901C01) ()
农业部中央级公益性科研院所基本科研项目 ()