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In this article we give bounds for the eigenvalues of a matrix, which can be seen as a common generalization of meet and join matrices and therefore also as a generalization of both GCD and LCM matrices. Although there are some results concerning the factorizations, Ray Ban Sunglasses Toronto the determinant and the inverse of this so-called combined meet and join matrix, the eigenvalues of this matrix have not been studied earlier. Finally we also give a nontrivial lower bound for a certain constant cncn, which is needed in calculating the above-mentioned eigenvalue bounds in practice. So far there are no such lower bounds to be found in the literature. An indirect spectrophotometric method for the microdetermination of iodine or bromine in organic compounds is described. The method is based on an oxygen flask combustion yielding iodide or bromide, which is then reacted with an excess of potassium iodate or potassium bromate in acidic medium. The iodine or bromine is then reacted with an excess of chloranil and the absorbance of the unconsumed chloranil is measured in a solution of pH 9 at 292 nm. The method is applied satisfactorily to a wide range of iodine- or bromine-containing organic compounds with an average absolute error of ±0.36% and Ray Ban Aviators Canada a coefficient of variation (six determinations) of better than 1.1%.