Rarely are solvents used on their own in the laboratory. Invariably, they're used to bring into solution the sample to be analysed or the reactants to be reacted together. Also, many solvents themselves are used as mixtures, for example as eluants in HPLC or as extraction mixtures in GC.

ROMIL have long provided an optional service whereby ready-to-use solvent mixtures are made up to customer specifications. Such a service finds favour in routine QC where methods are established on defined mixtures and which must be made in large volumes.

The linked pages list examples of mixtures which have been produced to customer order and give an idea of what can be done.