Provider: ingentaconnect
Database: ingentaconnect
Content: application/x-research-info-systems
TY - ABST
AU - Blevins, D. R.
AU - O'Neill, W. R.
TI - Spectrographic Calculations with Computerized Emulsion Calibration and Programmable Calculator Computations
JO - Applied Spectroscopy
PY - 1976-03-01T00:00:00///
VL - 30
IS - 2
SP - 190
EP - 195
KW - Transmittance transforms
KW - Photographic emulsion calibration
KW - Calculator applications
KW - Computer applications
KW - Photographic microphotometry
KW - Emission spectrography
N2 - 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.
UR - http://www.ingentaconnect.com/content/sas/sas/1976/00000030/00000002/art00011
M3 - doi:10.1366/000370276774456363
UR - http://dx.doi.org/10.1366/000370276774456363
ER -