First- and second-order approaches for the direct determination of bridging stresses from R-curves

2010 ◽  
Vol 30 (6) ◽  
pp. 1229-1236 ◽  
Author(s):  
S. Fünfschilling ◽  
T. Fett ◽  
S.E. Gallops ◽  
J.J. Kruzic ◽  
R. Oberacker ◽  
...  
Keyword(s):  
Direct Determination ◽  
Second Order ◽  
Bridging Stresses

scholarly journals Direct determination of trans-resveratrol in human plasma by spectrofluorimetry and second-order standard addition

Talanta ◽  
2010 ◽  
Vol 82 (2) ◽  
pp. 640-645 ◽  
Author(s):  
Cristina D. Bernardes ◽  
Ronei J. Poppi ◽  
Marcelo M. Sena
Keyword(s):  
Human Plasma ◽  
Direct Determination ◽  
Standard Addition ◽  
Second Order

scholarly journals Simultaneous and Direct Determination of Vancomycin and Cephalexin in Human Plasma by Using HPLC-DAD Coupled with Second-Order Calibration Algorithms

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Le-Qian Hu ◽  
Chun-Ling Yin ◽  
Ya-Hui Du ◽  
Zhi-Peng Zeng
Keyword(s):  
Human Plasma ◽  
High Performance ◽  
Complex Analysis ◽  
Direct Determination ◽  
Second Order ◽  
Decomposition Algorithms ◽  
Statistical Comparison ◽  
Trilinear Decomposition ◽  
Second Order Calibration

A simple, rapid, and sensitive method for the simultaneous determination of vancomycin and cephalexin in human plasma was developed by using HPLC-DAD with second-order calibration algorithms. Instead of a completely chromatographic separation, mathematical separation was performed by using two trilinear decomposition algorithms, that is, PARAFAC-alternative least squares (PARAFAC-ALSs) and self-weight-alternative-trilinear-decomposition- (SWATLD-) coupled high-performance liquid chromatography with DAD detection. The average recoveries attained from PARAFAC-ALS and SWATLD with the factor number of 4 (N=4) were101±5% and102±4% for vancomycin, and96±3% and97±3% for cephalexininde in real human samples, respectively. The statistical comparison between PARAFAC-ALS and SWATLD is demonstrated to be similar. The results indicated that the combination of HPLC-DAD detection with second-order calibration algorithms is a powerful tool to quantify the analytes of interest from overlapped chromatographic profiles for complex analysis of drugs in plasma.

Direct determination of propranolol in urine by spectrofluorimetry with the aid of second order advantage

2007 ◽  
Vol 595 (1-2) ◽  
pp. 282-288 ◽  
Author(s):  
Lucas C. Silva ◽  
Marcello G. Trevisan ◽  
Ronei J. Poppi ◽  
Marcelo M. Sena
Keyword(s):  
Direct Determination ◽  
Second Order
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