Overcoming constraints of the control charting approach for measurement uncertainty assessments
| LEADER | caa a22 4500 | ||
|---|---|---|---|
| 001 | 605465606 | ||
| 003 | CHVBK | ||
| 005 | 20210128100303.0 | ||
| 007 | cr unu---uuuuu | ||
| 008 | 210128e20151201xx s 000 0 eng | ||
| 024 | 7 | 0 | |a 10.1007/s00769-015-1161-0 |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s00769-015-1161-0 | ||
| 245 | 0 | 0 | |a Overcoming constraints of the control charting approach for measurement uncertainty assessments |h [Elektronische Daten] |c [Amaury Borges-Miranda, Isabel Marquez-Leyva, Carlos Pérez-Martínez, Juan Jiménez-Chacón, Manuel Álvarez-Prieto] |
| 520 | 3 | |a This report proposes an alternative approach for measurement uncertainty estimation avoiding the two main limitations of the control charting approach in a context were certified reference materials are unavailable. The procedures under study estimated the mass fraction of total alkaloids as nicotine and Kjeldahl total nitrogen in powdered samples of air-cured leaves of Cuban cigar tobacco. The intermediate precision estimated from results of different analysts was evaluated in parallel at three levels of mass fraction trough a spiking experiment using test portions of a one composite non-certified reference material per procedure and a balanced fully nested design. The systematic effect component was estimated in the same mass fraction levels but using a different set of samples covering a wide range of the typical routine test materials. An iterative re-weighted least squares linear regression analysis was performed between the results obtained through the assessed procedure with those attained from a reference one which analyses the same measurand. The estimation was then carried out using a proposed mathematic expression derived from the application of the uncertainty propagation law to the equation for bias estimation for every reference concentration. The uncertainty associated with bias estimation was furthermore evaluated over the whole mass fraction range considered in the procedure comparison study. The interpretation of the evaluated parameters is discussed regarding the specifics analytical characteristics of each procedure. | |
| 540 | |a Springer-Verlag Berlin Heidelberg, 2015 | ||
| 690 | 7 | |a Measurement uncertainty |2 nationallicence | |
| 690 | 7 | |a Non-certified reference materials |2 nationallicence | |
| 690 | 7 | |a Spiking experiment |2 nationallicence | |
| 690 | 7 | |a Iterative re-weighted least squares linear regression analysis |2 nationallicence | |
| 690 | 7 | |a Validation |2 nationallicence | |
| 690 | 7 | |a w obs : Observed mass fraction of the analyte (from the assessed procedure) represented in the ordinate (y) axis |2 nationallicence | |
| 690 | 7 | |a w ref : Reference mass fraction of the analyte represented in the abscissa (x) axis |2 nationallicence | |
| 690 | 7 | |a δ : Estimated bias |2 nationallicence | |
| 690 | 7 | |a u 2( a ) : Variance of the intercept |2 nationallicence | |
| 690 | 7 | |a u 2( b ) : Variance of the slope |2 nationallicence | |
| 690 | 7 | |a u ( w ref, i ) : Uncertainty of the ith reference value |2 nationallicence | |
| 690 | 7 | |a u 2( w obs, i ) : Variance of the ith data obtained by the assessed procedure |2 nationallicence | |
| 690 | 7 | |a $$\bar{w}_{{{\text{ref}},i}}$$ w ¯ ref , i : Mean of the ith reference value |2 nationallicence | |
| 690 | 7 | |a u c : Combined standard uncertainty |2 nationallicence | |
| 690 | 7 | |a u ( δ ) : Uncertainty of the bias estimation |2 nationallicence | |
| 690 | 7 | |a u c /w obs : Relative combined standard uncertainty |2 nationallicence | |
| 690 | 7 | |a U : Expanded uncertainty (k=2) |2 nationallicence | |
| 690 | 7 | |a U/w obs : Relative expanded uncertainty (k=2) |2 nationallicence | |
| 690 | 7 | |a s ta : Standard deviation under intermediate precision estimated from results obtained at different times by different analysts |2 nationallicence | |
| 690 | 7 | |a a : Intercept of a linear regression equation |2 nationallicence | |
| 690 | 7 | |a b : Slope of a linear regression equation |2 nationallicence | |
| 690 | 7 | |a W i : Weight for the ith data point |2 nationallicence | |
| 690 | 7 | |a n : Number of measurements |2 nationallicence | |
| 700 | 1 | |a Borges-Miranda |D Amaury |u Tobacco Research Institute, Carretera Tumbadero km 8 ½, San Antonio de los Baños, Artemisa, Cuba |4 aut | |
| 700 | 1 | |a Marquez-Leyva |D Isabel |u Tobacco Research Institute, Carretera Tumbadero km 8 ½, San Antonio de los Baños, Artemisa, Cuba |4 aut | |
| 700 | 1 | |a Pérez-Martínez |D Carlos |u Faculty of Chemistry, University of Havana, Zapata y G, Vedado, Havana, Cuba |4 aut | |
| 700 | 1 | |a Jiménez-Chacón |D Juan |u Institute of Science and Technology of Materials, University of Havana, Zapata y G, s/n, Plaza, Havana, Cuba |4 aut | |
| 700 | 1 | |a Álvarez-Prieto |D Manuel |u Faculty of Chemistry, University of Havana, Zapata y G, Vedado, Havana, Cuba |4 aut | |
| 773 | 0 | |t Accreditation and Quality Assurance |d Springer Berlin Heidelberg |g 20/6(2015-12-01), 473-482 |x 0949-1775 |q 20:6<473 |1 2015 |2 20 |o 769 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s00769-015-1161-0 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s00769-015-1161-0 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Borges-Miranda |D Amaury |u Tobacco Research Institute, Carretera Tumbadero km 8 ½, San Antonio de los Baños, Artemisa, Cuba |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Marquez-Leyva |D Isabel |u Tobacco Research Institute, Carretera Tumbadero km 8 ½, San Antonio de los Baños, Artemisa, Cuba |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Pérez-Martínez |D Carlos |u Faculty of Chemistry, University of Havana, Zapata y G, Vedado, Havana, Cuba |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Jiménez-Chacón |D Juan |u Institute of Science and Technology of Materials, University of Havana, Zapata y G, s/n, Plaza, Havana, Cuba |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Álvarez-Prieto |D Manuel |u Faculty of Chemistry, University of Havana, Zapata y G, Vedado, Havana, Cuba |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Accreditation and Quality Assurance |d Springer Berlin Heidelberg |g 20/6(2015-12-01), 473-482 |x 0949-1775 |q 20:6<473 |1 2015 |2 20 |o 769 | ||