FN Archimer Export Format PT J TI Determination of ultra-low U-236/U-238 isotope ratios by tandem quadrupole ICP-MS/MS BT AF TANIMIZU, Masaharu SUGIYAMA, Naoki PONZEVERA, Emmanuel BAYON, Germain AS 1:1;2:2;3:3;4:3; FF 1:;2:;3:PDG-REM-GM-LGM;4:PDG-REM-GM-LGM; C1 Japan Agcy Marine Earth Sci & Technol, Kochi Inst Core Sample Res, Nanko Ku, Kochi 7838502, Japan. Agilent Technol Int Japan Ltd, Hachioji, Tokyo 1920033, Japan. IFREMER, Unite Rech Geosci Marines, F-29280 Plouzane, France. C2 JAMSTEC, JAPAN AGILENT TECHNOL INT JAPAN LTD, JAPAN IFREMER, FRANCE SI BREST SE PDG-REM-GM-LGM IN WOS Ifremer jusqu'en 2018 copubli-int-hors-europe IF 3.396 TC 41 UR https://archimer.ifremer.fr/doc/00152/26358/24440.pdf LA English DT Article AB Isotope ratios of U-236/U-238 were measured at levels below 10(-7) by single collector ICPMS with a tandem quadrupole mass separation mechanism. Peak tailing of the prominent U-238(+) ion beam on the U-236(+) peak was reduced to the level of similar to 10(-10) by use of two quadrupole mass filters. The (UH+)-U-235 interference on U-236(+) was efficiently reduced to a UH+/U+ ratio of 1 x 10(-8) by an ion-molecule reaction between UH+ and O-2 in a collision/reaction cell placed between the two quadrupoles. The resultant detection limit for U-236/U-238 measurement was better than those reported by any other ICPMS study. The U-236/U-238 ratios, measured as (UO+)-U-236-O-16/(UO+)-U-238-O-16, were determined in the range 10(-9) to 10(-7) without correction for spectral interference. Accurate measurements of U-236/U-238 to as low as 1 x 10(-10) are projected. PY 2013 SO Journal Of Analytical Atomic Spectrometry SN 0267-9477 PU Royal Soc Chemistry VL 28 IS 9 UT 000322922300002 BP 1372 EP 1376 DI 10.1039/c3ja50145k ID 26358 ER EF