To change moderator purity: ! Moderator D2O ! Atom purity - 99.91 % EVALUATE Tmod Pmod ppmB hpitch mhpitch hpitchm01 mhpitchm01 := 346.0 99.91 0.0 28.575 2. / -28.575 2. / 28.575 2. / 0.1 - -28.575 2. / 0.1 + ;