- ppb level
- Золотодобыча: мг/т, миллиграмм на тонну, частиц на миллиард
Универсальный англо-русский словарь. Академик.ру. 2011.
ppb level
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Luisa Ottolini — (born July 10, 1954 in Tortona, province of Alessandria, Italy) is an Italian physicist. Her research activities are concerned mainly with the development, set up and optimisation of microanalytical procedures for the quantitative determination… … Wikipedia
Proton transfer reaction - mass spectrometry — (PTR MS) is a very sensitive technique for online monitoring of volatile organic compounds (VOCs) in ambient air developed by scientists at the Institut für Ionenphysik at the Leopold Franzens University in Innsbruck, Austria [A. Hansel, A.… … Wikipedia
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Perchlorate — Structure et dimensions de l ion perchlorate Modèle 3D de … Wikipédia en Français
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