以2,4-二硝基苯肼乙腈溶液-pH 5磷酸盐缓冲液(体积比为1∶1)为提取溶液,提取香菇中游离的甲醛,采用高效液相色谱法测定.结果表明,乙腈-pH 5磷酸盐缓冲液(体积比为1∶1)能够有效地抑制香菇中酶反应释放甲醛,达到提取香菇中游离甲醛的目的.在提取液中加入衍生化试剂2,4-二硝基苯肼,将甲醛的提取和衍生化反应相结合,此衍生液提取方法有效地提高了检测效率.鲜香菇样品中分别添加5.0、10.0、20.0 mg/kg 的甲醛,平均回收率分别为89.2% 、91.7%和90.4% ,相对标准偏差(n=6)<5.0% .方法的定量限(S/N>10)为5.0 mg/kg.该方法适用于香菇中游离甲醛的检测,且快速简便、重现性好,是确定香菇中甲醛天然本底值的有效方法.
参考文献
[1] | Zhang W D.Chinese Journal of Food Hygiene (张文德.中国食品卫生杂志),2006,18(5):455 |
[2] | Lü Y Q,Lin K,Hou S B.Chinese Journal of Health Laboratory Technology (吕玉琼,林凯,侯穗波.中国卫生检验杂志),2002,12(6):701 |
[3] | Yasumoto K,Iwami K,Mitsuda H.Agric Biol Chem,1971,35:2059 |
[4] | Fujimoto K.Mushroom Science,Proceedings of the Ninth International Scientific Congress on the Cultivation of Edible Fungi,Tokyo:[s.n.],1974 |
[5] | NY/T 1283-2007 |
[6] | Okada S,Iga S,Isaka H.J Hygien Chem,1972,18(6):353 |
[7] | Peng J F,Liu J F,Lü A H,et al.Chinese Journal of Analysis Laboratory (彭锦峰,刘景富,吕爱华,等.分析试验室),2005,24(4):57 |
[8] | Yamazaki H,Ogasawara Y,Sakai C,et al.J Food Hygiene Soc Japan,1980,21(3):165 |
[9] | Mason D J,Sykes M D,Panton S W,et al.Food Addit Contam,2004,21(11):1071 |
[10] | Tyihák E,Blunden G,Yang M H,et al.J Appl Phycol,1996,8:211 |
[11] | Claeys W,Vleminckx C,Dubois A,et al.Food Addit Contam,2009,26(9):1265 |
[12] | Li J R,Hu Z H,Jiang Y M.Transactions of the Chinese Society of Agricultural Engineering (励建荣,胡子豪,蒋跃明.农业工程学报),2008,24(10):252 |
[13] | Chen X M,Shi X X,Zhu W J,et al.Chinese Journal of Analytical Chemistry (陈笑梅,施旭霞,朱卫建,等.分析化学),2004,32(11):1489 |
[14] | SN/T 1547-2005 |
[15] | DB33/T 555-2005 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%