Abstract: A prepartive chromatography system, and a separation and purification method using the system, are provided for small scale, low cost, efficient multicomponent separation and purification without the drawbacks of conventional separation and purification systems. The chromatography system and the separation and purification method using it include three or more column units arranged in parallel, and their outlets, from which fractions are taken out, are connected to the same flow path.

Abstract: A preparative chromatography system, and a separation and purification method using the system, are provided for small scale, low cost, efficient multicomponent separation and purification without the drawbacks of conventional separation and purification systems.

Abstract: The object is to provide a multistage liquid-solid fractional extraction apparatus in which a separation procedure of a large amount of mixture can be carried out exactly and effectively in a simple procedure by use of a partition difference in liquid chromatography. The multistage liquid-solid fractional extraction apparatus comprises multiple containers 3 capable of accommodating liquid and solid for a liquid-solid extraction, a liquid inlet part 1 and a liquid outlet part 2 equipped with in each container, a pipe 4 to carry liquid from the liquid outlet part of the forward container to the liquid inlet part of the backward container, an efflux protecting device (filter 5) for solid, which is equipped with at the above liquid outlet part, and along with these a stirring device to let solid in said container move in liquid by virtue of the density difference between solid and liquid when rotating or swinging the container 3.

Abstract: The object is to provide a multistage liquid-solid fractional extraction apparatus in which a separation procedure of a large amount of mixture can be carried out exactly and effectively in a simple procedure by use of a partition difference in liquid chromatography.

Abstract: The object is to provide a multistage liquid-solid fractional extraction apparatus in which a separation procedure of a large amount of mixture can be carried out exactly and effectively in a simple procedure by use of a partition difference in liquid chromatography. The multistage liquid-solid fractional extraction apparatus comprises multiple containers 3 capable of accommodating liquid and solid for a liquid-solid extraction, a liquid inlet part 1 and a liquid outlet part 2 equipped with in each container, a pipe 4 to carry liquid from the liquid outlet part of the forward container to the liquid inlet part of the backward container, an efflux protecting device (filter 5) for solid, which is equipped with at the above liquid outlet part, and along with these a stirring device to let solid in said container move in liquid by virtue of the density difference between solid and liquid when rotating or swinging the container 3.

Abstract: A liquid-liquid extraction method and apparatus using an elongated extraction column arranged at an angle to the horizontal. The column is divided by means of partitions into a plurality of compartments which are in communication by apertures in such partitions. Each end of the extraction column has an inlet and an outlet, which can preferably be arranged concentrically, for the introduction and discharge of two immiscible liquids of differing densities, the less dense liquid being introduced into the lower inlet and discharged through the upper outlet and vice versa for the more dense liquid. The column during extraction is rotated either about its own axis or a spaced parallel axis. The extracting liquid can be circulated for back-extraction through a similarly arranged column containing a third liquid immiscible with the extraction liquid and of differing density.

Abstract: A method for determining the amount of carboxylic acid in which a carboxylic acid in a sample sample is reacted with a hydroxylammonium salt under the presence of carbodiimide to provide hydroxamic acid and the thus formed hydroxamic acid is reacted with a ferric compound to provide ferric hydroxamate, and a system for carrying out the method are disclosed.