The hyphenated form lends itself better to compound modifiers, as in “mid-twentieth-century furniture.” So when the less common noun phrase is used, we prefer to retain the hyphen: “mid-twentieth century.” A similar logic has discouraged us from advising “midtwentieth century”—though we...
In short, methods of analysis used are either rapid tests for effective support in the operations or hyphenated technologies, usually mass spectrometry-based, that generate comprehensive and confirmatory data. In that regard, liquid chromatography-tandem mass spectrometry (LC-MS/MS) is often considered...