Toyo Soda Manufacturing Co., Ltd.

Tosoh Corporation

Yoshimitsu Tada

Tetsuo Ikushige

Susumu Matsushita

Nobuyuki Baba

Hideo Morinaka

Noriyuki Tanimoto

Tadashi Okada

Disclosed are a closed heat-decomposing appliance comprising a heating section with one side closed and other side having common ground portion, screw portion or O-ring-mounted portion and a closed introducing section that allows to connect to this heating section and common ground portion, screw portion or O-ring via O-ring-mounted portion and has cock or valve as a mechanism for closing and introducing the absorbing liquid to absorb the testing components from outside after heat-decomposition, or has packing or septum to introduce the absorbing liquid with needle pipe as well, and a pretreatment method of sample using this appliance. The purpose is to provide a closed heat-decomposing appliance for the pretreatment on accurate quantitative determination or detection of the testing components in sample, which requires no combustion assistant, which is not obstructed by ash present in sample absorbing the testing components, which requires no complicated and dangerous procedures, which can be used repeatedly, and which allows to inject the absorbing liquid after heat-decomposition, and a pretreatment method using it.

Closed heat-decomposing appliance, pretreatment method of sample using it, analytical method and device therefor

The present invention relates to a chromatographic apparatus for analyzing a sample of an aqueous solution containing a plurality of micro-concentration components. In the apparatus an aqueous solution sample and an eluting solution are introduced into a separating column having a length of 20 to 90 mm, which is filled with a predetermined separating carrier and placed in a thermostatic oven which also contains a detecting cell connected to the separating column, by means of a constant flow, pulse free feeding pump.

Chromatographic apparatus

A high speed liquid chromatography to separate hydrocarbon compounds contained in a solution into three components, namely, saturates, unsaturates and aromatics, an analytical method of hydrocarbons which comprises

Analytical method of hydrocarbon compounds

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Tokuyama, Japan

Yoshimitsu Tada