Patent ID: 7569183

Claim:
An analyzer comprising: an extractor for extracting from a feces sampling container a fecal suspension which is formed by dispersing feces in a feces-dissolving liquid contained in the feces sampling container; a diluter for adding and mixing a diluting solution into/with the extracted fecal suspension in a predetermined amount, the diluting solution having a different concentration from that of the feces-dissolving liquid with respect to a specific pigment, the specific pigment in either one of the feces-dissolving liquid and the diluting solution having a concentration of zero; a detector for detecting the concentration of the specific pigment to be changed in response to the addition of the diluting solution; and a determinator for determining the adequacy of the extraction amount of the fecal suspension in accordance with the detected concentration of the specific pigment, wherein: the detector is operable to measure the optical absorbance of the diluted fecal suspension at each of two wavelengths consisting of a first wavelength around a maximum absorption wavelength of the specific pigment and a second wavelength different from the first wavelength; and the determinator is operable to compare a first difference between respective optical-absorbance values measured by the detector with a second difference between respective optical-absorbance values measured at the two wavelength in the feces-dissolving liquid diluted at a predetermined dilution rate, and determine the adequacy of the extraction amount of the fecal suspension in accordance with the comparison result.