These well documented observations would take just over two centuries to become an analytical technique.

She wrote two scholarly books in the 1980s which used an analytical technique called neoformalism.

Test key findings by applying other analytical techniques.

Over the years, mass spectrometry proved to be a widely used and powerful analytical technique and a variety of laboratory instruments became available from several companies.

Armed with what would now be considered primitive analytical techniques and basic purification methods, scientists embarked on a daunting route to uncover the molecular structure of adrenaline.