Simultaneous determination of acetaminophen and caffeine in tablet preparations by partial least-squares multivariate spectrophotometric calibration

Simultaneous determination of Fe(III) and Al(III) by first-derivative spectrophotometry and partial least-squares (PLS-2) method – Application to post-haemodialysis fluids

“…The combination of derivative techniques with multivariate calibration methods has been proposed [23][24][25][26][27][28][29][30][31][32][33]. PLS methods present two modifications known as PLS-1 and PLS-2.…”

Simultaneous determination of paracetamol, caffeine and propyphenazone in ternary mixtures by micellar electrokinetic capillary chromatography

“…The determination of PAR, CAF, PRO and their mixtures with different compounds by using spectrophotometry [2][3][4][5][6] gas chromatography [7,8], HPLC [9][10][11] and various capillary electrophoresis techniques [12][13][14][15][16][17] have been described.…”

Multiway analysis applied to time‐resolved chemiluminescence for simultaneous determination of paracetamol and codeine in pharmaceuticals

“…From these ranges, four concentrations were selected and standard solutions including a duplex combination of PAR and COD were prepared based on a full factorial design (a design with all possible high/low combinations of the input factors). Using this choice of design, possible interactions and non‐linearities can be accounted . The N‐PLS, PLS and ANN models were obtained using a total of 16 standard solutions, which were obtained by adding adequate volumes of PAR and COD stock solutions to a 100.0 mL volumetric flask and diluting to the mark with water.…”