Method development for on-line species-specific sulfur isotopic analysis by means of capillary electrophoresis/multicollector ICP-mass spectrometry

Abstract

In this paper, we investigate the performance of optical packet switches. Optical packet switches are operated entirely in the optical domain (except for the header extraction). The optical buffering is realised by using fiber delay lines (FDL's). We analyse, using generating functions, an optical buffering structure, consisting of FDL's with increasing lengths. We use this analysis to investigate the packet loss rate (PLR) in two types of switches with output buffering.

Data processing made easy: standalone tool for automated calculation of isotope ratio from transient signals – IsoCor

“…In this case, the delta value of the sample measured relative to the working standard d smp/work.std i/j needs to be converted to the delta value relative to the CRM d smp/std i/j using the delta value of the CRM measured relative to the same working standard d std/work.std i/j (eqn ( 8)). 34 The delta value of the sample measured relative to the working standard d smp/work.std i/j can be expressed by the isotope ratio of the sample R smp i/j and isotope ratio of the working standard R work.std i/j to obtain eqn (9). In IsoCor, we use eqn (10) for delta calculation to include the possibility to perform delta scaling by user-provided scaling coefficient coef into the App.…”

“…When conducting isotope analysis of sulfur, the delta should be reported relative to VCDT (Vienna Cañon Diablo meteorite) scale using the CRM IAEA-S-1 as recommended by IUPAC to enable comparability between the laboratories. 33 Thus, the scaling coefficient coef from eqn (10) was set to 0.9997 calculated according to eqn (11) where d 34/32 IAEAÀSÀ1/VCDT S ¼ À0.0003 36 The modication of eqn (9) to eqn (11) can be explained by the scaling of d 34/32 VCDT/IAEAÀSÀ1 S to d 34/32 IAEAÀSÀ1/VCDT S using eqn (12).…”

“…Moreover, on-line separation of different elemental species of the target element makes the species-specic isotope analysis possible by eliminating the contribution of non-fractionating species without performing laborious off-line sample preparation. 8,9 The depth of the information about isotope fractionation of the element is substantially increased by studying target species, which allows to address questions like provenance determination, geochronological dating, medical diagnosis and environmental pollution monitoring. The hyphenated systems introduce the possibility to analyse several species within one run, drastically decrease analysis time, increase sample throughput, and minimize "human error".…”

“…Fig.4Comparison of the d34/32 S values between the original publication9 and IsoCor for different River water samples measured with CE/MC-ICP-MS. The isotope ratio calculation method was PAI with 100% peak.…”

Species-specific isotope dilution analysis of monomethylmercury in sediment using GC/ICP-ToF-MS and comparison with ICP-Q-MS and ICP-SF-MS

“…The LRS approach, however, is not suited for low S/N because it requires data without baseline correction. Therefore, a baseline-corrected PAI approach of a previous work [ 36 ] was adapted for the determination of the isotope ratio of 201 Hg/ 202 Hg of the MMHg peak. The average baseline intensity and standard deviation ( s ) were determined from 50 data points each before and after the peak.…”