Knowledge Base

Goal: This paper reports high-precision in situ determination of Pb isotope ratios in glass samples, using 200 nm UV fs laser ablation coupled with the Thermo Scientific Neptune Plus Multicollector ICPMS equipped with 1013 ohm resistor high gain Faraday amplifiers. It present a very elegent algorithm to compensate for the different amplifier responses.

Goal: We tested 5 newly manufactured 1013 ohm resistors in the feedback loop of Faraday cup amplifiers to measure small ion beams by Thermal Ionisation Mass Spectrometry (TIMS). To investigate the precision and accuracy of analyses using these new amplifiers we measured Sr and Nd isotopes of reference standards at a range of ion currents (3.2 × 10−16 to 1 × 10−12 A, corresponding to intensities of 32 μV to 100 mV on a default 1011 ohm amplifier) and on small amounts of material (100 and 10 pg).

Goal: This presentation shows new tools for new science: 1013 ohm amplifier technology for achieving higher isotope ratio precision for limited sample amounts and minor isotopes using NEPTUNE Plus

Goal: This presentation shows new tools for new science: 1013 ohm amplifier technology adds to U-Pb dating tools

Goal: In this presentation, we present our latest developments on low noise Faraday cup amplifier technology, that completely avoids the dead time calibration as well as instrumental mass bias effects introduced by ion counters. This technology is ideally suited for high precise U-Pb age dating by ID-TIMS.

Goal: This presentation describes the technology of multicollector mass spectrometry for the analysis of isotope ratios and explains how the Thermo Scientific product portfolio is ideally suited for geochronology applications

Goal: Here we present a technique of measuring all Fe isotopes simultaneously with high mass resolution, a very effective way to eliminate molecular interferences. Various Fe standards, spiked standards and geological samples were measured with the Thermo Scientific NEPTUNE Multicollector ICP-MS with both, a proprietary Stable Introduction System (SIS) and a desolvating nebulizer (CETAC Aridus) to evaluate the use of static multicollection with high mass resolution.

Goal: Here we describe a selection of applications on isotopic fingerprinting using non-traditional stable isotope systems of S, Ca, Fe, Cu and Sr measured on the Thermo Scientific TRITON Plus and NEPTUNE Plus mass spectrometers

Goal: The present technical note presents a gain calibration protocol for 1013 ohm resistor current amplifiers using the certified neodymium standard JNdi-1 on the Thermo Scientific™ TRITON Plus™ Thermal Ionization MS (TIMS).

Goal: This technical note is intended to give recommendations on how to use the Tera-Ohm feedback resistors (1012 ohm) amplifiers for small samples and test their performance on the Triton Plus. Major focus is put on noise and decay characteristics.

Goal: Based on more than 35 years of experience in variable multicollector instrumentation, we have developed the Thermo Scientific TRITON Plus, our latest generation Thermal Ionization Mass Spectrometer (TIMS). It combines new, innovative features, like dual RPQ and compact discrete dynode multi ion counting multipliers, with the field-proven technology of the Thermo Scientific TRITON instrument.

Goal: Based on more than 35 years of experience in variable multicollector instrumentation, we have developed the advanced Thermo Scientific NEPTUNE Plus, our latest generation Multicollector ICP Mass Spectrometer. It combines new, innovative features, like dual RPQ, compact discrete dynode multi ion counting multipliers and unmatched sensitivity using the Jet Interface, with the field-proven technology of the NEPTUNE instrument.

Goal: The present note describes a method allowing for precise and accurate sulfur isotope measurements on small aliquots of human serum and plasma. This method can also be applied to a broad range of biological samples, such as whole blood, urine or organs. The measurements were done on a Thermo Scientific Neptune Plus Multicollector ICP-MS .

Goal: Thi goal of this study is to demonstrate that simultaneous acquisition of U-Pb age and Hf isotopic composition is possible with small ablation spots (30 μm diameter) using the LASS technique with high-sensitivity ICP-MS instruments