第四章高效液相色谱解说.ppt
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示差折光检测器 蒸发光散射检测器的特点: 1.可作梯度 2.流动相可为 100% 的水和可挥发的缓冲液 3.对温度不敏感 4.灵敏度高10-50ng 5. 通用型质量检测器,对各种物质均有响应,且响应因子基本一致,它不依赖样品分子中的特殊官能团或生色团。 蒸发光散射检测 1.?Aspartame??(0.9mg/mL) 2.?Cortisone??(0.3mg/mL) 3.?Reserpine??(0.3mg/mL) 4.?Dioctyl Phthalate??(0.3mg/mL) Column: Platinum? C18, 3μm, 20 x 4.6mm Mobile Phase: A: 0.05% Formic Acid in Water B: Acetonitrile with 0.05% Formic Acid Gradient: (Time,%B), (0,5), (3,90), (10,5) Flowrate: 1.0mL/min Detector: Alltech ELSD 800 ELSD does not Respond to Changes in Mobile Phase Composition, Allowing Rapid Separations using Extreme Gradients Mono-, Di-, Tri-, Oligosaccharides 1.? iso-Erythritol 2.? Fructose 3.? Sorbitol 4.? Mannitol 5.? Glucose (DP1) 6.? Inositol 7.? Sucrose 8.? Maltitol 9.? Maltose (DP2) 10.? Raffinose 11.? Maltotriose (DP3) 12.? Maltotetraose (DP4) 13.? Maltopentaose (DP5) 14.? Maltohexaose (DP6) 15.? Maltoheptaose (DP7) 16.? Maltooctaose (DP8) 17.? Maltononaose (DP9) 18.? Maltodecaose (DP10) 19.? Maltoundecaose (DP11) 20.? Maltododecaose (DP12) 21.? Maltotridecaose (DP13) 22.? Maltotetradecaose (DP14) Column: Prevail? Carbohydrate ES, 5μm, 250 x 4.6mm (Part No. 35101) Mobile Phase: A: Acetonitrile B: 0.04% Ammonium Hydroxide in Water Gradient: (Time,%B)(0,17),(25,27),(40,45),(60,55) Flowrate: 1.0mL/min Detector: Alltech ELSD 5% Tween 80 Column: Alltima? C18, 5μm, 250 x 4.6mm Mobile Phase: Water:Methanol (60:40) Flowrate: 1.0mL/min Detector: Alltech ELSD 质量检测器 结构: 1. 电喷雾离子化(ESI)和大气压 化学离子化(APCI)的MS。 2. 化学工作站。 功能: 1.快速鉴定化合物 2.色谱峰的纯度检验 3.复杂基质中痕量成分定量 液相色谱的检测器性能对比 最小检出限(g) 梯度操作影响 选择性 温度等影响 UV 10-12 小 窄 小 FLD 10-13 小 较窄 较小 RI 10-6?10-7 大 广泛 大 ELSD 10-9 ? 10-10 小 广泛 小 The ELSD Improves Baseline Stability and Detection Sensitivity Compared to RI Column: Prevail? Carbohydrate ES, 5μm, 53 x 7mm (Part No. 35104) Mobile Phase: Acetonitrile:Water (75:25) Flowrate: 2.0mL/min 1.?Fructose 2.?Glucose 3. Sucrose RI ELSD The ELSD Responds to Al
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