A program has been written for a relatively inexpensive desk-top programmable calculator which can easily be used to calculate the concentration of unknowns from an absorbance curve established by any number of data points. This procedure readily evaluates data from continuous-flow analysis as well as from other automated and spectrophotometric instrumentation. The coefficient of determination (R2) is determined for each set of standards to evaluate how well the data points fit the calculated curve. The program is also designed to identify the values of control samples which lie outside the programmed limits for each test.
The data handling procedure includes: the printing of the input of the standards; the calculating of a curve; the calculating and printing of the standard concentrations as determined from the calculated curve and the resulting R* value; the calculating and printing of the sample concentrations and a controlling step which identifies values for control samples which lie outside preset limits, thus calling immediate attention to any trouble with the tests. * Printed copies of this program will be made available upon special request. However, the program is coded with a I-digit code that would only have meaning for tise with Wang Models 700 or 720 calculators.