Preparation chromatography is a chromatographic technology equipment used to separate and prepare purified substances from mixtures. Unlike analytical chromatography, which mainly focuses on the localization and content determination of each component in the mixture, preparation chromatography focuses on effectively obtaining a certain amount and purity of the target compound to meet the needs of research, development, or production.
The preparation of chromatography is based on the distribution difference of substances between the stationary phase and the mobile phase to achieve component separation. When the sample passes through the chromatographic column, each component is repeatedly distributed between the mobile phase (carrier gas or liquid) and the stationary phase (chromatographic column packing) due to different physical and chemical properties (such as boiling point, polarity, adsorption). The component with a higher distribution coefficient flows out to achieve separation. The separated target component is converted into an electrical signal by a detector, recorded as a chromatogram, and then collected and desolventized to obtain a product with qualified purity.
Specifically, the preparation of chromatography instruments achieves this goal through chromatographic techniques such as liquid chromatography, with main functions including:
Separation and Purification: It can process complex mixtures of organic synthetic products, natural compounds, proteins, etc. By optimizing mobile phase, chromatographic column conditions, etc., the target compound can be separated from impurities to obtain high-purity samples.
Preparation scale: Unlike analytical chromatographs that focus on trace detection, preparation chromatographs are designed for large-scale preparation and are suitable for purification from milligrams to grams, meeting the needs of laboratory research or industrial production.
Automation and Intelligence: Modern preparative chromatographs are typically equipped with high-precision pump systems, multi-mode detectors (such as UV visible detectors), gradient elution functions, and intelligent collection systems, which can automatically control solvent gradients, identify chromatographic column parameters, and support multiple collection modes (such as peak collection or window collection), improving separation efficiency and repeatability.
core component
High pressure pump: provides stable mobile phase transport, supports gradient elution, and improves separation efficiency.
Automatic sampler: reduces the risk of cross contamination and ensures injection accuracy.
Chromatographic column: Select the type of stationary phase (such as C18, silica gel, etc.) based on the properties of the target compound, with a column diameter range of 10mm-1000mm.
Detector: commonly used UV detectors, diode array detectors, etc., providing real-time monitoring at all wavelengths.
Collection system: Intelligent collection of target components, supporting solvent removal treatment to obtain purified products.