Romil have introduced a range of ultra-purity solvents, Romil-UpS, for high-sensitivity techniques. Applications such as environmental analysis now require routine detection of trace amounts of pollutants, and hyphenated techniques need a solvent quality matched to the requirements of all the configured detectors. Purification techniques of the new solvents are more exacting and each batch is carefully use-tested. Product is filled into bottles which have been specially pre-treated to ensure that trace metal impurities are kept as low as when freshly manufactured. Thus, not only is the original purity controlled but also the actual purity when opened some time later.