Analytical Chemistry

Reversible cell, 229

Rf values, 155

Ring current, 402

Robotics, laboratory, 522

Robots,

arm systems, 522

Cartesian, 522

cylindrical, 522

ROM, 530

Rotational fine structure, 365

S

Sample application, TLC, 156

Sample concentration and clean-up solid phase extraction, 504

Samples, biological, 504

Sampling and sample pretreatment, 503

Sampling procedures, 503

Scintillation counters, 460

Scintillators,

liquid, 460

primary, 461

secondary, 461

solid, 460

Secondary fluorescence, 341

Selection rules, 274

Selectivity, 164

ratio, 235

Self-ionization, 42