Droplet dispensing apparatus

A droplet dispensing apparatus, comprising:

• a droplet ejection device having a solution holding vessel and an array of nozzles for ejection of droplets communicating with the solution holding vessel;
• and
• a stage having a microplate holder configured to hold a microplate including an array of wells into which the droplets are ejected, and a sheet stand on which a test sheet for testing the array of nozzles can be placed, wherein
• the test sheet has a receptive layer for receiving a droplet and becomes colored or discolored at a place where a light-transmissive droplet is received, and
• the stage is configured to move to a first position at which the microplate holder is below the array of nozzles and to a second position at which the sheet stand is below the arrays of nozzles.

A method for testing a droplet ejection device, comprising:

• placing a test sheet for testing an array of nozzles of a droplet ejection device on a sheet stand of a droplet dispensing apparatus, the test sheet being at a same height as an upper surface of a microplate when the microplate is attached to a microplate holder of the droplet dispensing apparatus;
• positioning the droplet ejection device above the test sheet;
• ejecting droplets from the array of nozzles onto the test sheet;
• and
• capturing image of the test sheet after ejecting the droplets, wherein
• the test sheet has a receptive layer for receiving a droplet and becomes colored or discolored at a place where a light-transmissive droplet is received.