A droplet dispensing apparatus comprising: a droplet ejection array having a plurality of nozzles from which droplets can be ejected into a well opening of a microplate on a baseplate; a sensor (230, 240) configured to measure a value for detecting a liquid amount in the microplate; the sensor being one of a weight measuring device that measures a weight of the microplate and a transparency sensor that detects a presence or absence of droplets discharged from the nozzle in the plurality of nozzles based on a measured or otherwise detected transparency of the microplate; and a controller (232, 242) configured to detect that a nozzle in the plurality of nozzles is not discharging during a droplet ejection process based on an initial liquid amount in the microplate as detected by either the weight measuring device or the transparency sensor and a final liquid amount in the microplate as detected by either the weight measuring device or the transparency sensor during a droplet ejection process in which a predetermined number of droplets are to be ejected from the plurality of nozzles into the microplate, characterized in that the controller (232, 242) is further configured to: calculate an expected reduction due to drying during the droplet ejection process based on an initial measured value of the microplate by either the weight measuring device or the transparency sensor and a reference measured value of the microplate by either the weight measuring device or the transparency sensor after a lapse of a predetermined time from when the initial measured value is obtained; and signal that at least one nozzle in the plurality of nozzles is not discharging when a final measured value is less than the initial measured value plus any expected increase due to droplets ejected during the droplet ejection process between when the initial measured value was obtained and when the final measured value was obtained minus the expected reduction due to drying. a droplet ejection array having a plurality of nozzles from which droplets can be ejected into a well opening of a microplate on a baseplate; a sensor (230, 240) configured to measure a value for detecting a liquid amount in the microplate; the sensor being one of a weight measuring device that measures a weight of the microplate and a transparency sensor that detects a presence or absence of droplets discharged from the nozzle in the plurality of nozzles based on a measured or otherwise detected transparency of the microplate; and a controller (232, 242) configured to detect that a nozzle in the plurality of nozzles is not discharging during a droplet ejection process based on an initial liquid amount in the microplate as detected by either the weight measuring device or the transparency sensor and a final liquid amount in the microplate as detected by either the weight measuring device or the transparency sensor during a droplet ejection process in which a predetermined number of droplets are to be ejected from the plurality of nozzles into the microplate, characterized in that the controller (232, 242) is further configured to: calculate an expected reduction due to drying during the droplet ejection process based on an initial measured value of the microplate by either the weight measuring device or the transparency sensor and a reference measured value of the microplate by either the weight measuring device or the transparency sensor after a lapse of a predetermined time from when the initial measured value is obtained; and signal that at least one nozzle in the plurality of nozzles is not discharging when a final measured value is less than the initial measured value plus any expected increase due to droplets ejected during the droplet ejection process between when the initial measured value was obtained and when the final measured value was obtained minus the expected reduction due to drying. calculate an expected reduction due to drying during the droplet ejection process based on an initial measured value of the microplate by either the weight measuring device or the transparency sensor and a reference measured value of the microplate by either the weight measuring device or the transparency sensor after a lapse of a predetermined time from when the initial measured value is obtained; and signal that at least one nozzle in the plurality of nozzles is not discharging when a final measured value is less than the initial measured value plus any expected increase due to droplets ejected during the droplet ejection process between when the initial measured value was obtained and when the final measured value was obtained minus the expected reduction due to drying.