Analytical Letters is an international medium for the rapid publication of original research papers, accelerated articles, or mini-reviews on important developments in all areas of analytical chemistry, including electrochemistry, mass spectrometry, separations, and spectroscopy. Papers are welcomed that consider fundamental developments, new or improved instrumentation and sensors, and applications of analytical chemistry in all areas that include biological and clinical science, engineering and instrumentation science, environmental chemistry and analysis, geochemistry, materials science, nanotechnology, and physics.