@article {Blevins:1976-03-01T00:00:00:0003-7028:190,
author = "Blevins, D. R. and O'Neill, W. R.",
title = "Spectrographic Calculations with Computerized Emulsion Calibration and Programmable Calculator Computations",
journal = "Applied Spectroscopy",
volume = "30",
number = "2",
year = "1976-03-01T00:00:00",
abstract = "Photographic spectrographic calculations of intensity ratios and the corresponding element concentrations are performed faster and more accurately with programmable desk calculators than by graphical methods. These calculations are facilitated by applying a transform to microphotometer
transmittance readings to make them linear with respect to intensity. This transform has the form log [{(100 − *T*)/*T*} {(a + *T*)/*T*}] where a is the transform constant and *T* is percent transmittance. A FORTRAN computer program strategy is given for calculating
the transform constant from emulsion calibration data and obtaining a linear equation for the emulsion calibration curve. This equation is used to program a desk calculator to convert transmittance readings to intensity ratios corrected for background. A second calculator program computes
element concentrations from the intensity ratios.",
pages = "190-195",
url = "http://www.ingentaconnect.com/content/sas/sas/1976/00000030/00000002/art00011",
doi = "doi:10.1366/000370276774456363",
keyword = "Transmittance transforms, Photographic emulsion calibration, Calculator applications, Computer applications, Photographic microphotometry, Emission spectrography"
}