Improved accuracy for the analysis of soft magnetic alloys by inductively-coupled plasma atomic emission spectrometry by using advanced standardization procedures

Abstract

The applicability of simultaneous ICP-OES for the accurate analysis of soft magnetic alloys has been investigated. Long-time signal variations of up to 40% can be observed under normal operating conditions. The scattering of the values can largely be compensated by a correction procedure with internal and external standardization where the intensity value of the analytical signal is first rationed to the simultaneously measured intensity of an internal standard line and after that recalibrated with an external standard. Not only the trueness but also the precision could be improved by using Cd as a real-time internal standard. This is attributed to a compensation for instrumental fluctuations as a result of the simultaneous measurement of both emission signals.

Vascular graft infections: In vitro and in vivo investigations of a new vascular graft with long‐term protection

“…All of the samples were incubated in the phosphate‐buffered solution at 37°C for a period of 52 weeks under constant agitation; during the first 190 days the elution solution was replaced daily by fresh phosphate‐buffered solution, and thereafter weekly to the end of the 52 weeks. The concentration of silver in the eluate was determined with the aid of inductively coupled plasma atomic emission spectrometry (ICP‐OES, Optima 3000DV, PerkinElmer) 19, 20. To determine the daily release of silver from day 190 onwards (weekly eluate replacement), the silver contents determined per week were divided by 7 to obtain the daily silver release, assuming that this remained constant between two measuring time points.…”

Simultaneous ICP atomic emission spectrometry for accurate stoichiometric determination: application to a YNi2B2C superconducting material system

“…These are suitable prerequisites for the application of extended chemometric procedures of data interpretation and data correction. [5][6][7][8] Our experiences in stoichiometric analysis of several different multi-component materials with a CID spectrometer are summarised and described in this paper. Different data interpretation procedures, such as multi-line measurements for each analyte element, optimum calibration and recalibration routines and internal standardisation, have been applied to the superconducting material system YNi 2 B 2 C, which is used as an example to compare different measuring routines and to demonstrate the potential of optimised measurements for materials characterisation.…”