V.A. PKS.-l and V.A. PKS.-2, Real Time G. C. Data

8-617

Integrator and G. C. Data Manipulator

Dr. J. B. Pearce, Ball Brothers Research Corporation,

Boulder, Colorado; Dr. S. P. Levine, Veterans Administra-

tion Hospital, Denver, Colorado; P. J. R. Boyle, University

of Colorado, Denver, Colorado; J. L. Naylor, Veterans

Administration Hospital, Denver, Colorado

V.A. PKS.-l

GC separation and integration is accomplished by an assembly

language program which makes extensive use of the floating

point arithmetic interpreter. The real time portion of the

program samples data from the GC detector once per second.

This data is smoothed and differentiated using a weighted, odd

integer smoothing routine. When the derivative exceeds an

operator selected value, a "GC peak" is provisionally es-

tablished. If the peak satisfies the selected minimum width

criterion, the location and area of this event are either

printed out immediately on the teletypewriter or stored in

memory for further processing if there is evidence that the

peak is incompletely resolved. When the GC data returns

to within a selectable vicinity of the baseline, or five peaks

is exceeded, the perpendicular drop method is used to resolve

them and the results are printed out.

V.A. PKS.-2

Automatic data reduction is as important as peak area inte-

gration. Reduction of the data is accomplished using the

same equipment in an off-line mode. This segment of the

program accepts the paper tapes generated by the first seg-

ment, as well as additional information from the keyboard.

This program also uses the floating point interpreter. The

interpreter remains resident.in core and only the driving

segments of the program need be exchanged.

Minimum Hardware:
4K PDP-8, 189 A/D, ASR33,

KW08 or R401 clock packages,

Computer-compatible GC

Other Programs Needed:
Floating Point Processor (DEC-

08-YQZB-PB)

Miscellaneous:
This program has also been modi-

fied for use on the PDP-12. In-

formation may be obtained from:

Tom Jenkins, Mass. Spectrometry

Laboratory, Cold Regions Research

Laboratory, Hanover, N. H.

Source Language:
PAL-8

Catalog: July 1974

Minimum Hardware:	4K PDP-8, 189 A/D, ASR33, KW08 or R401 clock packages, Computer-compatible GC
Other Programs Needed:	Floating Point Processor (DEC- 08-YQZB-PB)
Miscellaneous:	This program has also been modi- fied for use on the PDP-12. In- formation may be obtained from: Tom Jenkins, Mass. Spectrometry Laboratory, Cold Regions Research Laboratory, Hanover, N. H.
Source Language:	PAL-8
Catalog:	July 1974