Dibutyl phthalate (DBP) is a phthalic acid ester and is widely used in polymeric products to make them more flexible. DBP is found in almost every plastic material and is believed to be persistent in the environment. Various analytical methods have been used to measure DBP in different matrices. Considering the ubiquitous nature of DBP, the most important challenge in DBP analyses is the contam...

a r t i c l e i n f o Keywords: Secondary ion mass spectrometer Isotope ratios Oxygen High precision Instrumental bias We have developed highly precise and accurate in situ SIMS stable isotope analytical protocols using the IMS-1280 at the University of Wisconsin, through careful tuning of the instrument, stable electronics, and improved protocols for sample preparation, standardization and aut...

The paper presents electromagnetic finite element analyses for the eddy current losses in permanent magnets of synchronous machines. The main focus lies on high order element formulations and the comparison of the respective results against an analytical evaluation of these losses for both linear and rotational arrangements. Therefore, the representation of skin depth and wave length with the n...

Abstract Due to the increasing population and resulting transportation needs, number of subway high-speed railway projects has also increased. The geometric constraints such have caused many tunnels be built in weak ground. Thus, ground tunnelling attracted attention tunnel engineers researchers. main purposes this study are analyse T4 excavated compare results obtained from analytical solution...

his paper analyzes the legislative influence of upper houses in bicameral legislatures. We note the existence of two separate analytical traditions, one focusing on upper house expertise, the other on upper house power. We hypothesize that because legislative analyses of unitary systems focus primarily on the "efficient" aspects of upper house input, they tend to emphasize senatorial expertise....

Two analytical methods based on the Agilent 7890A GC system are developed for simultaneous analysis of methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O) in air samples. Each system has its own features to meet different requirements of greenhouse gases analyses. Both systems can easily be expanded to determine sulfur hexafluoride (SF6). Results from both methods demonstrated high sensiti...

The recent development of the intense pulsed muon source at J-PARC MUSE, Japan Proton Accelerator Research Complex/MUon Science Establishment (10(6) s(-1) for a momentum of 60 MeV/c), enabled us to pioneer a new frontier in analytical sciences. Here, we report a non-destructive elemental analysis using µ(-) capture. Controlling muon momentum from 32.5 to 57.5 MeV/c, we successfully demonstrate ...

Challenges Facing Industrial Analytical Labs Many routine QC/QA laboratories can perform material analyses with single range, basic Fourier transforminfrared (FT-IR) instrument configurations. However, modern analytical laboratories face increasing workloads from a broad range of sample types with a simultaneous drive for faster results and more complex sample characterization needs. Flexibilit...