Abstract: An immunoassay method including the steps of: preparing a measuring sample by mixing a specimen with an immunoreactive substance, capable of specifically binding to a defined analyte, allowing the sample to react for a given reaction time, measuring a signal related to interactions of the immunoreactive substance with the analyte in the sample over the reaction time, checking on the basis of signals measured at different times, whether or not prozone effect has occurred in the sample and marking of a prozone-positive sample accordingly, and calculating from at least one of the signals measured during the reaction time the concentration of analyte in the sample by using a calibration curve or a portion of a calibration curve covering concentrations of analyte causing prozone effect for prozone positive samples, and another calibration curve or portion or calibration curve covering concentrations of analyte not causing prozone effect for the remaining samples.

Abstract: A cleaning device comprises a cleaning head, a first handle segment, a second handle segment and a closure structure. The cleaning head includes a scrubbing portion, a squeegee portion and a handle attachment structure. The first handle segment includes a first end portion and a second end portion. The first end portion is engaged with the handle attachment structure of the cleaning head. The second handle segment includes a first end portion, a second end portion, and a storage space. The first end portion of the second handle segment is engaged with the second end portion of the first handle segment. The storage space extends between the first and second end portions thereof. An open end portion of the storage space is provided at the second end portion of the second handle segment. The closure structure engaged at the second end portion of the second handle segment covers the open end portion of the storage space.