Results from a multicenter evaluation of the 4th generation Elecsys Troponin T assay.

Background And Objective: Discrepancies between serum and heparin plasma samples have been described for many commercial troponin assays including the cardiac troponin T (cTnT) assay. Using the current 3rd generation Elecsys Troponin T immunoassay, heparin plasma cannot be recommended for the determination of cTnT due to systematic lower test results caused by a direct interference of the immunoassay by heparin. The purpose of the multicenter study was to evaluate the analytical performance of an improved 4th generation Elecsys Troponin T immunoassay with a special focus on the comparability of cTnT results determined in heparin plasma and serum.

Selenium measurement in human plasma with Zeeman effect electrothermal atomic absorption spectrometry: sample stability and calibration method.

The dual aim of the present study is the investigation of the stability of plasma samples for selenium determination with time and temperature and the assessment of the calibration method. A comparative study is performed, using two calibration methods: standard addition to each sample and matrix matched curve. Our findings show that, in general, significant differences in the selenium content are observed when comparing the results obtained with these two calibration methods.

[Elaboration of "cotija" type cheese made of whole milk and chickpea (Cicer arietinum L.) mixture].

The objective [corrected] of this work was to elaborate "cotija" type cheese prepared with whole milk and chickpea (Cicer arietinum L.), inoculated with S. Thermophilus and to compare its physicochemical, microbiological and sensorial characteristics with a commercial cheese.

Reference values of selenium in plasma in population from Barcelona. Comparison with several pathologies.

Plasma selenium reference values from healthy donors in the metropolitan area of Barcelona are determined. A random sample from 156 healthy adults (control group) is analysed by using electrothermal atomic absorption spectrometry with Zeeman effect background correction. The relationship between several pathologies and Se content is also evaluated.

Study of preanalytical conditions for selenium determination in urine.

Objective: Assessment of preanalytical and storage conditions for selenium determination in urine.

Design And Method: A design is established for the study of the effect of HCl as sample preservative, and for the stability of urine samples with time and temperature of storage. The effect of sample sonication before taking aliquots is also evaluated.