Figure 3.
Representative 700 MHz 1D-CPMG 1H NMR spectrum (64 ms echo time) of saliva between 0.70 and 8.50 ppm. The residual water signal between 4.40 and 5.50 ppm has been removed. The vertical scale for the regions, 2.50−4.50 ppm and 5.00 to 8.50 ppm, has been doubled and increased by a factor of four times, respectively. Saliva was centrifuged at 15 000g prior to freezing, with quantification via external TSP in a coaxial tube. The acetate peak has been truncated.