Carl G. Johnson
Facility Manager and Principal Spectrometrist
Mr. Carl Johnson has been the principal Facility spectrometrist and
manager since 1984, during which time he has had primary responsibility for the
current Finnigan DeltaPlus IRMS, three organic MS’s (Finnigan 3200, 4500 and VG
Autospec-Q), two NMR spectrometers (Bruker AC-300 and Avance 400), and was
responsible the successful setup, testing, operation and return to shore of a
Finnigan LCQ-MS (ion-trap) onboard Oceanus
cruise 367 in 2001. He schedules all facility work, oversees Facility finances,
and serves as a general analytical chemistry and instrument resource for the
Fye laboratory (which houses the Facility). He has coordinated the selection,
site preparation and installation of many of these instruments, performed
essentially all of the maintenance and suggested/implemented numerous
improvements and upgrades.
While the Facility is primarily a service provider of
a suite standard analyses, he has had the occasional opportunity to undertake
original development projects of his own where his abilities to learn, apply
and develop new techniques have involved him with endeavors as diverse as supercritical
fluid chromatography (SFC)-MS, the redesign and fabrication of several GC/MS
inlet/systems, demonstrating the use of high resolution MS for alkenone unsaturation
ratio measurements, working out the LC-LSIMS analysis of trapped free radical
ions, optimization of NMR conditions. He also assisted Ms Leah Houghton in
her development of reduced sample size d15N analysis of pigments.
Nelson M. Frew
Dr. Nelson Frew oversaw the Facility's earliest years before pursuing independent research interests in air-sea gas exchange. He was the original principal operator of the Finnigan 1015 and 3200 GC/MS systems and was responsible for bringing the Finnigan 4500 GC/MS to WHOI in 1982.
Dr. Frew remains available to consult on mass spectrometric issues.