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hanye_168

铁虫 (初入文坛)

[求助] 糖浆特征物分析(主要针对蜂蜜掺假,小麦糖浆和木薯糖浆),求教! 已有1人参与

我是检测关于蜂蜜掺假的,对于新的糖浆,需要找出其特征物,进液质,发现峰分不开,出峰时间才2分钟左右,如何可以把峰分开,希望可以给些建议,谢谢!
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celan

专家顾问 (知名作家)

从事NMR和有机化合物结构鉴定


DETERMINATION OF SUGAR COMPOSITION IN PORTUGUESE
HEATHER HONEYS BY HPLC/RI

HPLC analysis of sugars
The HPLC method of AOAC (1990) [10] was followed except that acetonitrile-water mobile phase and
solvent flow rate used were 80/20 and 1.5 ml/min., respectively, to improve the separation of the individual
sugars on the column. Thus, separation of compounds was achieved with an analytical HPLC unit (Gilson),
using an refractive index detector and an μ-Bondapak/Carbohydrate (300x4 mm I.D., Waters Associates,
nº84038) column. A 20 μl portion of each prepared honey sample was injected and the sugars content was
calculated by external standard method using peak areas. A 20 μl aliquot of the mixed sugars standard was
injected in duplicate at the beginning, during, and at the end of each day’s run to check retention time and
peak area.

http://www.apimondia.com/congresses/2001/Papers/080.pdf
6楼2014-04-18 08:49:59
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lifucheng

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【答案】应助回帖

★ ★ ★ ★ ★
感谢参与,应助指数 +1
hanye_168: 金币+5, ★★★很有帮助 2014-01-15 14:11:13
试试氨基柱或者HILIC长柱 应该可以加大保留时间的
2楼2014-01-12 20:10:00
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冷观风雨

木虫 (小有名气)

氨基柱,加大流动相浓度,我就是这么干的
3楼2014-03-27 22:24:10
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skychen001

银虫 (小有名气)

我最近也在做糖,C18柱子对单糖或二糖保留不好,可以更换色谱柱,来增加保留时间。不过,不知道你是什么仪器,如果是三重四级杆等串联质谱,而且你分离目标物只有两个,就可以选用C18也没问题,那样色谱柱只起到一个分离杂志的作用就可以了!
4楼2014-03-30 22:40:28
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