Accession Number : AD0643718

Title :   EFFECT OF THE PLOTTING PARAMETER 'K' UPON LIGHT-SCATTERING RESULTS,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y

Personal Author(s) : Boeul,Michel ; Eirich,Frederick

Report Date : OCT 1966

Pagination or Media Count : 81

Abstract : The optimization of the Zimm grid fit, as applied to the scattering of light from dilute polymer solutions, is discussed as a function of the plotting parameter 'k'. The characteristic parameters of the polymer and of its solution are relatively insensitive to the choice of 'k'; however, it is shown by a detailed error analysis, that a theoretically predictable value of 'k' minimizes the ratio of a function of error of the independent variable (a linear combination of the concentration and of a function of the scattering angle) to the same function of error of the dependent variable (the reciprocal intensity function). Optimal fit is obtained by choosing a value of the plotting parameter 'k' such that, on the average, the error committed on the independent variable is less than one percent of that committed on the dependent variable. It is thus shown that 'k' is not arbitrary, but that a predictable value can optimize the fit of the grid. (Author)

Descriptors :   (*LIGHT, SCATTERING), MOLECULES, POLYNOMIALS, MATHEMATICAL PREDICTION, LEAST SQUARES METHOD, SOLUTIONS(MIXTURES), POLYMERS, ERRORS, OPTIMIZATION

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE