Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Patent
1979-07-12
1982-01-26
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
356246, 356417, G01N 2173
Patent
active
043125913
ABSTRACT:
Disclosed is apparatus for automatically transporting liquid samples from sample vessels to the burner of a flame atomic absorption spectrometer or a flame photometer. A sample feed tube pivots between a first position with its end disposed in a sample feeding vessel for discharging, in sequence, sample liquid and a flushing liquid into the feeding vessel and a second position with its end in communication with a sample vessel. The sample feeding vessel has an upper opening, a bottom outlet, and a cavity between the outlet and opening having an annular convex interior surface to ensure accurate and repeated insertion of the sample feed tube into the sample feeding vessel when the sample feed tube is moved into its first position and full and complete discharge of the sample liquid into the sample feeding vessel. A control mechanism is provided to prevent discharge of the sample liquid from the sample feed tube unless and until the sample feed tube obtains its first position.
REFERENCES:
patent: 3163699 (1964-12-01), Staunton
patent: 3740157 (1973-06-01), Kasparek
Bodenseewerk Perkin-Elmer & Co. GmbH
Giarratana S. A.
Hays R. A.
Masselle F. L.
McGraw Vincent P.
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