Table 1.

Coefficient of determination and slope of linear regression between the relative change in APT SI and saturation pulse duration and power at each pH

pH	Change in saturation pulse
	Duration (sec)		Power $\left(\mu T\right)$
	R2	Slope	R2	Slope
6.53	0.938	0.62	0.995	77.08
6.84	0.930	0.53	0.984	8.46
6.91	0.921	0.56	0.981	15.32
7.25	0.886	0.48	0.960	5.88
7.65	0.816	0.35	0.943	4.92

APT, amide proton transfer; SI, signal intensity.