Automatic atomic-absorption spectrometry method

Details Automatic atomic-absorption spectrometry method Automatic atomic-absorption spectrometry method

1989-01-17

1990-12-11

Evans, F. L.

Optics: measuring and testing

By dispersed light spectroscopy

356311, 356328, G01J 342

Patent

active

049765418

ABSTRACT:
Each sample is analyzed for all desired elements before starting the next sample, using thermal or nonthermal atomizing devices fro liquid or solid samples. Other new features include the grating drive, lamp-carousel alignment, pulsed atom source, lamp-drift compensation, and dynamic range control. The grating is driven by an arm, the arm by a taut band wound on a drum, and the drum directly by a motor. The lamp carousel mounts on an "L"-shaped rocker with one horizontal and one vertical arm. The carousel rotates on a horizontal axis at the end of the vertical arm. The rocker itself pivots on a horizontal axis at the corner of the L; it is driven about its axis by a motor and screw at the other end of the L. Carousel rotation on its axis moves the right lamp into position and adjusts it accurately in a vertical direction. Pivoting of the rocker simultaneously on its corner axis positions the lamp accurately in a horizontal direction. The pulsed atom source is a combined angled-gas-jet-and-discharge unit. During pulses it yields high absorption with better detectability limits; average power is lower. The lamp-drift compensator makes double duty of the absorber pulsation to obtain a lamp-intensity reading between pulses. Dynamic range control is obtained by even further exploiting the pulsation, namely by taking measurements at a known delay (and decay) time after each pulse.

REFERENCES:
patent: 3523748 (1970-08-01), Chrisholm et al.
patent: 3655288 (1972-04-01), Lieberman et al.
patent: 4300833 (1981-11-01), Harnly et al.
Hewlett-Packard, Analytical Advances, Autumn 1968, vol. 1, No. 1, pp. 1-16.
Hewlett-Packard, Bulletin 5960-Model 5960A Atomic Absorption Photometer.
Ediger, American Laboratory, Feb. 1978, pp. 67, 68, 75 and 76.
"Instrumentation '78", C & EN, Mar. 13, 1968, pp. 32-36, 40, 42-45, 47, 48, 54, 56, 59.
Dagnall et al, Talanta, vol. 13, Jun. 1966, pp. 803-808.
Demers, Applied Spectroscopy, vol. 22, No. 6, Nov.-Dec. 1968, pp. 797-798.
Norelco-UNICAM brochure, pp. 1-8.

Affiliated with

Also associated with

Rating

Automatic atomic-absorption spectrometry method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic atomic-absorption spectrometry method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic atomic-absorption spectrometry method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-386120