σ, π (sigma, pi), 1326 σ → σ* transition, 1326 σ-adduct, 1327 σ-bond, 1327 σ-constant, 1327 σ-orbital, 1328 s-cis, s-trans , 1328 saccharides, 1328 Sackur–Tetrode constant, 1328 sacrificial acceptor, 1328 sacrificial donor, 1329 salt, 1329 salt effect [obsolete] , 1329 salt form of an ion exchanger, 1329 salting out, 1329 sample error in spectrochemical analysis , 1330 sample handling in analysis , 1330 sample in analytical chemistry , 1330 sample injector in chromatography , 1331 sample unit, 1331 sampler, 1331 sampling error, 1331 sampling interval in electroanalysis, 1332 sampling plan in analytical chemistry , 1332 sampling time in electroanalysis , 1332 sandwich compounds, 1332 sanitary land fill, 1333 saprophyte, 1333 saturated solution, 1333 saturation, 1333 saturation activity, 1333 saturation fraction, , 1334 saturation in radioanalytical chemistry , 1334 saturation transfer, 1334 saturation vapour pressure, 1334 sawhorse projection, 1334