List of Articles PLS Open Access Article Abstract Page Full-Text 1 - Simultaneous spectrophotometric determination of ampicillin and penicillin in human plasma using multivariate calibration Ali Niazi Elham Janforozadeh Tahereh Momeni-Isfahani Neda Khorshidi Open Access Article Abstract Page Full-Text 2 - Simplex design method in simultaneous spectrophotometric determination of silicate and phosphate in boiler water of power plant and sewage sample by partial least squares Ali Mohammad Hajishabani Masoud Rohani Moghadam Shayesteh Dadfarnia Jahanbakhsh Ghasemi Open Access Article Abstract Page Full-Text 3 - Simultaneous spectrophotometric determination of lead, copper and nickel using xylenol orange by partial least squares Jahan B. Ghasemi Samira Kariminia Open Access Article Abstract Page Full-Text 4 - QSAR study of retention index of different alkanes and alkenes using different chemometrics methods Mehrana Motiee