Pulse length measurement in N.M.R. spectroscopy: a convenient digital method using second-dimension transformation

Abstract

A standardized procedure for the accurate measurement (1% error) (in reasonable time (10-20 min)) of critical pulse lengths is recommended. It uses the 2d-n.m.r. scheme:

[t₁t₂] → [f₁t₂] [t₂] → [f₂ ≡ θ]

where t₂ is an incremental time, f₁ is made to vanish by selection of a single point region and f₂ is equivalent to pulse length (angle θ). Pulse imperfections are readily detected. To make the method totally general sources of these imperfections should be corrected. Applications to T₁ and 2d-J n.m.r, measurements are outlined.