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Capillary ion chromatography with on-column focusing for ultra-trace analysis of methanesulfonate and inorganic anions in limited volume Antarctic ice core samplesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 ноября 2015 г.
- Авторы: Sanz Rodriguez E., Poynter S., Curran M., Haddad P.R., Shellie R.A., Nesterenko P.N.
- Журнал: Journal of Chromatography A
- Том: 1409
- Год издания: 2015
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 182
- Последняя страница: 188
- DOI: 10.1016/j.chroma.2015.07.034.
- Аннотация: Preservation of ionic species within Antarctic ice yields a unique proxy record of the Earth’s climate his-tory. Studies have been focused until now on two proxies: the ionic components of sea salt aerosol andmethanesulfonic acid. Measurement of the all of the major ionic species in ice core samples is typically car-ried out by ion chromatography. Former methods, whilst providing suitable detection limits, have beenbased upon off-column preconcentration techniques, requiring larger sample volumes, with potentialfor sample contamination and/or carryover. Here, a new capillary ion chromatography based analyti-cal method has been developed for quantitative analysis of limited volume Antarctic ice core samples.The developed analytical protocol applies capillary ion chromatography (with suppressed conductivitydetection) and direct on-column sample injection and focusing, thus eliminating the requirement foroff-column sample preconcentration. This limits the total sample volume needed to 300 uL per analysis,allowing for triplicate sample analysis with <1 mL of sample. This new approach provides a reliable androbust analytical method for the simultaneous determination of organic and inorganic anions, includ-ing fluoride, methanesulfonate, chloride, sulfate and nitrate anions. Application to composite ice-coresamples is demonstrated, with coupling of the capillary ion chromatograph to high resolution massspectrometry used to confirm the presence and purity of the observed methanesulfonate peak.
- Добавил в систему: Нестеренко Павел Николаевич