An open-source syringe pump has been developed for use in the analytical laboratory. Most pump parts are made on a 3D printer. Other parts (lead screw, guide rods, stepper motor, bearings, electronic components) are purchased in specialized stores. The control panel is based on the Arduino UNO. Device interaction, any settings changes, and operating mode selection are carried out using the LCD Keypad Shield (no computer connection required). The program for the microcontroller is written in Arduino IDE. Assembling the syringe pump takes several hours and requires almost no soldering. Universal clamp allows installing any syringe with a diameter of 6 to 25 mm. The syringe pump can both infuse the liquid and refill the empty syringe. To evaluate the analytical characteristics, a 10-mL glass syringe (Kloehn) was used. The dispensed volume was 1 and 5 mL. The systematic error was less than 0.1%, and the random one was less than 3 μL. Project files are available at: http://www.mass-spec.ru/projects/diy/syringe_pump/eng/.

Compounds from NIST′08 and Wiley 8th databases were considered as a representative subset of the general population of organic compounds which can be analyzed using mass spectrometry with electron...