LIGHT SOURCE APPARATUS FOR EMISSION SPECTROCHEMICAL ANALYSIS

摘要

PURPOSE:To perform an analysis with high sensitivity using a small quantity of a sample by using a thread made of inorganic material instead of an inert gas as a carrier of a solution sample. CONSTITUTION:A thread letting out means consists of a rereeling bobbin 2, a reeling bobbin 3, a reeling bobbin driving motor 4 and a guide roller 5, etc., and runs upward from the bottom the thread 1 made of inorganic fiber bundle at a fixed velocity. A solution sample-impregnating chamber 6 introduces the thread 1 through a flexible valve 7 for intercepting oxygen, and the sample solution A sent quantitatively from a peristaltic pump 8 is impregnated to the thread 1 therein. Cooling gaseous argon and plasma forming argon are suppled to an outer tube and inner tube of a plasma torch 9 of triple tube structure respectively, and the thread 1 impregnated with the sample is supplied through a center tube. The thread 1 penetrates upward through the center part of a plasma flame 10 formed by inductive action of high-frequency coil. Since the temp. at the center part of the plasma is 5,000-6,000 deg.K, a suitable running velocity is necessary for passing the thread.