Patent ID: 7760340

Claim:
A sample analyzer comprising: a first measuring part configured for measuring first optical information of a sample at first light of first wavelength, second optical information of a sample at second light of second wavelength, and third optical information of a sample at third light of third wavelength, wherein the first light of the first wavelength and the second light of the second wavelength are absorbed by a first substance but substantially not absorbed by a second substance, and the third light of the third wavelength is absorbed by the second substance; a preparing part configured for preparing a measurement sample by mixing a reagent with a part of the sample; a second measuring part configured for optically measuring the measurement sample prepared by the preparing part, wherein the first substance of an excessive content interferes with the measurement by the second measuring part and the second substance of an excessive content interferes with the measurement by the second measuring part; and a controller configured for executing operations comprising: determining whether one of content of the first substance and content of the second substance, from which the influence by the first substance is excluded, in the sample is excess or not based on the first, second, and third optical information measured by the first measuring part; analyzing the measurement sample based on the result of measurement by the second measuring part; and outputting an analysis result with a flag when one of content of the first and second substances is excess.