title: The development of an evaluation method for capture columns used in two-dimensional liquid chromatography.
abstract: Capture columns are important interface tools for on line two-dimensional liquid chromatography (2D-LC). In this study, a systematic method was developed to evaluate and optimize the capture ability of capture columns by off-line method. First, the parameter Δt(R) (Δt(R)=t(2)-t(1)-t(0)-W) was introduced to quantitatively represent the capture ability of the capture column by connecting a capture column behind the first dimensional column. Based on the value of Δt(R), an appropriate capture column was selected after the first dimensional column was fixed. Then, the capture ability of the selected column was promoted by adjusting the mobile phase of the first dimensional column. Capture ability was also optimized using complex sample analysis software system (CSASS) software. Second, the elution mode of the trapped compounds on the capture column was investigated by connecting the capture column before the second dimensional column. More specifically, in mode I, capture column was connected to the second dimension without changing the flow rate direction and the trapped compounds must pass through the capture column and be eluted into the second dimensional column. The contrary connection mode was mode II. It was found that mode I is more suitable method for 2D-LC. Finally, an off-line reversed-phase/hydrophilic interaction liquid chromatography two-dimensional liquid chromatography (RP/HILIC 2D-LC) system with a C18 capture column was developed to demonstrate the practical application of this method.
authors: Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology, Shanghai, China.
authors: Liwei
authors: L
authors: Cao
authors: Danhua
authors: D
authors: Yu
authors: Xinliang
authors: X
authors: Wang
authors: Yanxiong
authors: Y
authors: Ke
authors: Yu
authors: Y
authors: Jin
authors: Xinmiao
authors: X
authors: Liang
mesh_terms: D001554:Benzene / Q000737:chemistry / Q000302:isolation & purification; D001713:Biphenyl Compounds / Q000737:chemistry / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D032064:Hedyotis / Q000737:chemistry; D009281:Naphthalenes / Q000737:chemistry / Q000302:isolation & purification; D010616:Phenanthrenes / Q000737:chemistry / Q000302:isolation & purification; D012984:Software; D014529:Uridine / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D001554:Benzene; D001713:Biphenyl Compounds; D009281:Naphthalenes; D010616:Phenanthrenes; D014529:Uridine; C031721:naphthalene; C010574:biphenyl; C031181:phenanthrene