Comparative evaluation of steel mesh, steel fibre and high-performance polypropylene fibre reinforced shotcrete in panel test

2004 ◽  
Vol 34 (8) ◽  
pp. 1357-1364 ◽  
Author(s):  
O Cengiz ◽  
L Turanli
Keyword(s):  
Comparative Evaluation ◽  
High Performance ◽  
Steel Fibre ◽  
Polypropylene Fibre ◽  
Steel Mesh ◽  
Panel Test

scholarly journals Determination of Patulin in Apple Juice: Comparative Evaluation of Four Analytical Methods

2007 ◽  
Vol 90 (1) ◽  
pp. 162-166 ◽  
Author(s):  
David R Katerere ◽  
Sonja Stockenström ◽  
Gabriele Balducci ◽  
Gordon S Shephard
Keyword(s):  
Comparative Evaluation ◽  
High Performance ◽  
Apple Juice ◽  
Solid Phase ◽  
Phase Extraction ◽  
Low Concentrations ◽  
Relative Standard ◽  
Purification Methods ◽  
Union Directive

Abstract The performance of 4 purification methods for the analysis of patulin in apple juice was evaluated by high-performance liquid chromatography (HPLC). Samples were spiked with patulin at 10, 20, 50, 100, and 150 ppb (ng/mL) and extracted by one of 4 methods (3 solid-phase extraction and one liquidliquid extraction), and then analyzed by HPLCUV under the same isocratic conditions. The methods were validated for recovery, linearity, and precision at high and low concentrations. Recoveries were all >70% for spiking range 10-150 ppb. The relative standard deviation for repeatability was found to meet European Union Directive requirements. In addition, all the methods showed baseline separation from hydroxymethylfurfural.

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