Several series of papers have been published on the historic development of the DS, 1–5
the properties1 and limitations of derivative spectra2 as well as computer programs for …

The simultaneous voltammetric determination of melatonin (MT) and pyridoxine (PY) has
been carried out at a cathodically pretreated boron‐doped diamond electrode. By using …

A simple and highly selective method for the determination of piroxicam and pyridoxine
(vitamin B6) in pharmaceutical formulations is presented. The approach is based on the …

In this work a new modification of the standard addition method called “net analyte signal
standard addition method (NASSAM)” is presented for the simultaneous spectrofluorimetric …

Partial least-squares (PLS) calibration and principal component regression (PCR) methods
were utilized for the simultaneous spectrofluorimetric and spectrophotometric determination …

Two UV spectrophotometric methods have been developed, based on first derivative
spectrophotometry for simultaneous estimation of doxylamine succinate, pyridoxine …

It was found that melatonin and its derivatives, such as N-acetyl-5-methoxytryptamine (MT),
N-acetyl-5-hydroxytryptamine (NAS), 5-Methoxytrypt-amine (5-MT), 5-Methoxyindolyl acetic …

A simple, specific, accurate, precise stability indicating reversed‐phase high‐performance
liquid chromatographic (RP‐HPLC) method was developed and validated for the …

Melatonin and some of its important derivatives were found to be able to enhance the ECL of
Ru (bpy) 32+ in an alkaline Britton–Robinson buffer solution. The optimum conditions for the …

Melatonin (MLT) has many health implications, therefore it is important to develop specific
analytical methods for the determination of MLT in the presence of its main impurity, N-{2-[1 …