Patent ID: 9148942
Filing Date: 2015-09-29
Classification: G01N,H05H

Abstract:
1. An inductively coupled plasma spectrometry system comprising: a plasma torch assembly including a first tube having a proximate end and an inner diameter; a second tube disposed concentrically within the first tube, the second tube having a proximate end, a distal end and an outer diameter that is less than the inner diameter of the first tube, the outer diameter of the second tube having a substantially constant spacing from the inner diameter of the first tube; and a body including a first bore configured to receive the proximate end of the first tube, a second bore configured to receive the proximate end of the second tube, a manifold disposed between the first bore and the second bore and configured to receive a flow of gas to be injected between the first tube and the second tube, the manifold having an outer diameter at least substantially equal to the inner diameter of the first tube and an inner diameter at least substantially equal to the outer diameter of the second tube, the manifold having a width that is substantially equal to the substantially constant spacing between the outer diameter of the second tube and the inner diameter of the first tube; and an induction coil disposed around the first tube, the induction coil configured to be supplied with radio-frequency electric current to inductively energize the flow of gas to produce a volume of high-temperature plasma proximate to the distal end of the second tube that is insulated from the first tube by the flow of gas.