Measuring and testing – Sampler – sample handling – etc. – Analyzer supplier
Patent
1991-09-25
1993-11-09
Noland, Tom
Measuring and testing
Sampler, sample handling, etc.
Analyzer supplier
7386312, 7386323, 2391022, 250288, G01N 128, G01N 3500, H01J 4926, B05B 102
Patent
active
052592545
ABSTRACT:
An efficient sample introduction system and method of use, for accepting liquid sample solutions, nebulizing them to form nebulized sample solution droplets, and introducing the nebulized sample solution droplets to sample analysis systems is disclosed. In the preferred embodiment desolvation of produced nebulized sample solution droplets, and solvent removal, to provide nebulized sample particles is performed prior to entering sample to a sample analysis system. Nebulization of sample solutions is accomplished by use of high efficiency ultrasonic nebulizers and solvent removal is accomplished by use of high efficiency enclosed filter and solvent vapor removal gas flow or low temperature condenser systems. The sample introduction system provides improved sample solution nebulization, desolvation and solvent removal, as well as reduced sample loss and carry-over of sample from one analysis procedure to a subsequent analysis procedure, as compared to other systems which perform a similar overall function. The sample introduction system also enhances transport of sample through the sample introduction system to a sample analysis system. The present invention is equally effective with sample solutions in which the sample solvent is either water, or an organic solvent. The preferred embodiment of the present invention also teaches air cooling of the vibrational energy producing elements; and vibrational energy directing and focusing element which serves to increase the operational efficiency and lifetime of the ultrasonic nebulizer.
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Sutton John E.
Zhu Jianzhong
Cetac Technologies Inc.
Noland Tom
Welch James D.
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