Abstract: A method of detecting nozzle clogging by the use of threshold values that can be set easily is accomplished. Also, an analytical instrument equipped with a nozzle clogging detector using threshold values that can be set easily is accomplished. Threshold values corresponding to aspiration volumes of sample are calculated from plural threshold values (P1, P2, and P3) that have been set for discrete aspiration volumes (SV1, SV2, and SV3), respectively. The threshold values are found for each of plural aspiration programs corresponding to plural sets of conditions under which a sample is diluted, and for each of plural aspiration programs corresponding to plural kinds of samples. Threshold values are found for each of plural detection sensitivities.

Abstract: A method of detecting nozzle clogging by the use of threshold values that can be set easily is accomplished. Also, an analytical instrument equipped with a nozzle clogging detection means using threshold values that can be set easily is accomplished. Threshold values corresponding to aspiration volumes of sample are calculated from plural threshold values (P1, P2, and P3) that have been set for discrete aspiration volumes (SV1, SV2, and SV3), respectively. The threshold values are found for each of plural aspiration programs corresponding to plural sets of conditions under which a sample is diluted, and for each of plural aspiration programs corresponding to plural kinds of samples. Threshold values are found for each of plural detection sensitivities.