高油辣椒制品中辣椒素类物质的测定
高油辣椒制品中辣椒素类物质的测定(6900字)
摘 要:本文初步建立了HPLC(High performance liquid chromatographic method高效液相色谱法)测定高油辣椒制品中辣椒制品中两种主要辣椒素类物质的方法。样品以甲醇+正己烷进行预处理,采用反相高效液相色谱分离,紫外检测器;根据色谱峰的保留时间定性,以外标峰面积法定量辣椒素(C)、二氢辣椒素(DC)。采用色谱柱,ZORBAX SB-C18;流动相,V(甲醇)∶V(水)=65:35;UV检测波长,280 nm;辣椒素和二氢辣椒素RSD分别为5.11%,5.08%(n=5);回收率分别为89.4%、90.0%。辣椒素和二氢辣椒素在20-200ug/ml范围内线性良好。方法满足辣味水平评价要求。
关键词:辣椒;高油含量;HPLC;测定
DETERMINATION OF CAPSAICIN IN THE HIGH OIL PEPPER PRODUCTS
Abstract:A method was preliminary developed for the determination of capsaicinoids in highly oil-containing pepper productsby high performance liquid chromatography. The sample was extractedwith Methanol and Hexane. The analysis wasperformed on a C18 column (250×4.6 mm i.d.5μm) with 65∶35 Methanol-water as the mobile phase at a flow rate of 1.2 mL/min and detected at 280 nm. The determination of capsaicin(C),dihydrocapsaicin(DC) were processed by peak area andexternal standard method. The precisions of C and DC were good with the RSD of 5.11% and 5.08% espectively (n=5).The recoveries for C and DC are 89.4% and 90%respectively. The two ompounds demonstrated good linear relationship in the range of 20-200 ug/ml.
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Key words:Pepper, High oil content, HPLC, Determine
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目 录
摘 要 1
关键词 1
1 前言 2
2 材料与方法 3
2.1 材料 3
2.2 主要试剂 3
2.3 主要仪器设备 3
2.4 试验方法 3
2.4.1 样品提取溶剂选择性实验 3
2.4.2 正己烷最佳加入量的确定 4
2.4.3 高效液相色谱法条件选择试验 4
2.4.4 样品预处理 4
2.4.5 对照处理 4
2.5 标准溶液配制及绘制标准曲线. 5
2.6 结果计算 6 [资料来源:http://doc163.com]
2.6.1 辣椒素物质总量的计算 6
2.6.2 二氢辣椒素物质总量的计算 6
3 结果与分析 6
3.1辣椒素提取剂的确定 6
3.2 正己烷加入量的确定 6
3.3 高效液相色谱法条件确定 7
3.3.1 流动相的确定 7
3.3.2 流速的确定 8
3.3.3 UV检测波波长的选择 8
3.3.4色谱条件 8
3.4 线性关系 8
3.5 回收率试验 9
3.6 精密度试验 9
3.7 样品测定结果 10
4 结论 10
参考文献 10
致 谢 12 [资料来源:Doc163.com]