Хроматомасс‑спектрометрическая идентификация примесей в изотопно‑обогащенном силане
Sorry, this entry is only available in Русский.
Определение полихлорированных бифенилов и пестицидов
Sorry, this entry is only available in Русский.
Хроматомасс-спектрометрическая идентификация примесей
Impurities in high-purity carbon tetrachloride were identifi ed by gas chromatography/ mass spectrometry. The identifi cation was accomplished by comparison of experimental mass spectra with the spectra in NIST-2005 database. For concentrations, close to the limit of detection, the nature of impurities was determined using selective ion monitoring and retention times of the corresponding substances. For the fi rst time sulfur, 2 bromochloromethanes, hexachlorocyclopropane, saturated hydrocarbons C6–C18 and some aromatic impurities were identifi ed. Totally 41 impurity substances were found.
Определение содержания тяжелых полностью фторированных органических соединений
Sorry, this entry is only available in Русский.
