3D printed microchannels for sub-nL NMR spectroscopy
Fig 3
1H NMR measurements on pure water and lactic acid in water performed at 7.05 T.
The spectra are the real parts of the Fast Fourier Transform (FFT) of the time-domain NMR signals. Notations: V is the active volume, Avg number of averaged measurements, TR is the repetition time, τ is the pulse length, Tm is the matching filter decay time constant. (a) 1H spectrum of water: V ≅ 100 pL, Avg = 1000, TR = 4 s, τ = 3.5 μs, Tm = ∞ (b) 1H spectrum of 1.3 M lactic acid in H2O: V ≅ 100 pL, Avg = 10800, TR = 2 s, τ = 3.5 μs, Tm = 500 ms.