Direct determination of the samarium: neodymium ratio in geological materials by inductively coupled plasma quadrupole mass spectrometry with cryogenic desolvation. Comparison with isotope dilution thermal ionization mass spectrometry

Abstract

A cryogenic desolvation unit in the sample introduction system reduces differences in oxide formation between Sm and Nd to very low levels, enabling the direct, standardless determination of their ratio in bulk solutions by inductively coupled plasma mass spectrometry. The measured values are in reasonably good agreement with those determined by the isotope dilution thermal ionization mass spectrometry (ID-TIMS) reference technique. Although this method cannot, at present, compete with ID-TIMS in terms of precision and accuracy, it is much more straightforward and can be used in geochemistry for studies involving the screening of a large number of samples.

Low‐Level Analysis of Lanthanides in Eleven Silicate Rock Reference Materials by ICP‐MS After Group Separation Using Cation‐Exchange Chromotography

“…For the three reference materials of South African origin studied in this work, lanthanide abundances obtained by Jackson and Strelow (1975) using spark source mass spectrometry after cation exchange are given for comparison. For some of the s t u d i e d re f e re n c e m a t e r i a l s , t h e N d a n d S m concentrations obtained on the same batches of rock powder in this laboratory using isotope dilution thermal ionisation mass spectrometry (Pin et al 1995, Pin andSantos Zalduegui 1997) are also listed (Table 4). This permits the further evaluation of the accuracy of the method, and especially its ability to recover the lanthanides quantitatively.…”

Tholeiitic- and boninite-series metabasites of the Nové Město Unit and northern part of the Zábřeh Unit (Orlica–Śnieżnik Dome, Bohemian Massif): petrogenesis and tectonic significance

“…In brief, values of 143 Nd/ 144 Nd were measured from a purified Nd fraction with a Neptune Plus instrument using standard static multicollection methods with mass bias correction by normalization to 146 Nd/ 144 Nd = 0.7219, and are given relative to 143 Nd/ 144 Nd = 0.512115 for the JNdi-1 isotope reference. On an aliquot of the LREE fraction separated from major-and other trace elements using a TRU Spec extraction chromatographic column, 147 Sm/ 144 Nd values were deduced from measured 147 Sm/ 146 Nd values following a procedure adapted from Pin et al (1995) and Sanchez et al (2012). The results are in Table S2.…”

A high performance liquid chromatography ? inductively coupled plasma-mass spectrometry interface employing desolvation for speciation studies of platinum in chemotherapy drugs

“…The most promising approach is to produce a desolvated aerosol, followed by the removal of the solvent, to introduce a dry analyte particle into the plasma by using devices such as a thermospray or ultrasonic nebuliser with a membrane desolvator [16,17] or a condenser [18,19]. Alternatively the aerosol can be heated after nebulisation, either in the spray chamber or in a separate chamber followed by condensing the vapour [20][21][22][23][24] or membrane desolvation [25][26][27].…”