nanoelectrospray

https://doi.org/10.1351/goldbook.12502
Electrospray ionization at a very low solvent flow rate, typically hundreds of nanoliters per minute of sample solution or lower, often without the use of an external solvent delivery system.
Note: Nanospray should only be used to describe the commercial product.
Source:
PAC, 2013, 85, 1515. (Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)) on page 1571 [Terms] [Paper]