… physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis …
Explanatory notes
… oils, butter and other fatty substances, analysing jam, fruit juices, etc.), in the glass industry, in oil … Other models work on the basis of density, or by fractional condensation and distillation (cracking), or on … the like , used to determine viscosity (i.e., the internal friction of a liquid). They may be based on : (i) …