Compact trace element sensor which utilizes microwave generated

Details Compact trace element sensor which utilizes microwave generated Compact trace element sensor which utilizes microwave generated

1995-11-03

1998-10-20

Hantis, K.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

333 99PL, G01J 330, H01P 100, G01N 2169

Patent

active

058254854

ABSTRACT:
A method and portable apparatus for self-powered, sensitive analysis of solid, liquid or gas samples for the presence of elements is provided. The apparatus includes a compact sensor system which utilizes a microwave power source and a shorted waveguide to induce a plasma. The microwave power source may be a magnetron or the like. The device includes a portable power supply and preferably includes a portable battery charger. The portable power supply includes a compact generator- internal combustion engine unit. The device can be operated by directly using power from the portable power supply or in a more compact embodiment by using power from batteries that are recharged by a separate portable power supply module. Pulsed microwave operation can be used to reduce average power requirements and facilitate the use of very compact units using batteries. The device is capable of being transported to and from remote sites for analysis by an individual without the need for heavy transportation equipment. A computer may be utilized to control the portable power supply, the battery charger and the microwave power source. The method and apparatus are capable of analyzing samples for the presence of several elements simultaneously using fiber optic guides and a spectrometer system. The apparatus can be contained in a plurality of readily detachable modules to facilitate transportation and field operation.

REFERENCES:
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patent: 5479254 (1995-12-01), Woskov et al.
Fehsenfeld, "Microwave Discharge Cavities Operating at 2450 MHz", The Review of Scientific Instruments, vol. 36, No. #3 Mar. 1968, pp. 294-298.
Bacharach Instrument Co (Pittsburg, Pa), Produce description for "J-W Mercury Vapor Sniffer", No date.

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