@misc{indiciae5987a958f7ca, title = {An ion funnel interface for improved ion focusing and sensitivity using electrospray ionization mass spectrometry.}, author = {S A Shaffer and D C Prior and G A Anderson and H R Udseth and R D Smith}, year = {1998}, doi = {10.1021/ac9802170}, url = {https://pubmed.ncbi.nlm.nih.gov/9784749/}, note = {Source identifier: 9784749} }