High solids content sample torches and method of use

Details High solids content sample torches and method of use High solids content sample torches and method of use

1991-08-28

1993-08-03

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912154, 2191215, 21912159, 31511151, B23K 900

Patent

active

052331563

ABSTRACT:
Torches of the type used in Inductively Coupled Plasma sample analysis systems are disclosed. The torches are designed to provide a user with the ability to minimize sample carry-over and torch clogging problems during use. The torches are suitable for use with high solids content samples prepared by ultrasonic nebulization and other high efficiency sample introduction systems. The torches incorporate means based upon design criteria which include minimization of critical tapers or constrictions in sample injecting tube and other tubes of a torch, providing means which allow control of the temperature of various components in a torch and indirectly a sample per se introduced thereto, and providing means which allow auxiliary gas flows through a torch which aid sample flow through the torch. In addition, external control of sample solvent vapor content can be practiced during an analysis procedure to further reduce any tendency of sample solids to adhere to and accumulate upon torch components.

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