One challenge of teaching chemical analysis is the proliferation of sophisticated, but often
impenetrable, instrumentation in the modern laboratory. Complex instruments, and the …

The role of fossil fuels in providing the energy required for automobiles, factories and daily
life has seriously concerned the authorities. Consistency of the quality of petroleum-based …

The present work describes a portable photometer based on light-emitting-diodes (LED) for
the determination of total aromatic hydrocarbons in water contaminated with gasoline. Two …

A portable light-emitting-diode (LED) photometer has been developed to provide low-cost
seawater pH measurements. The benefits of the new system include a simple “do-it-yourself” …

Light source plays an important role in visible and near-infrared (Vis–NIR) spectroscopy
detection systems. Traditionally, halogen tungsten lamps are used in most studies and …

Analytical chemistry is a fast-paced field with frequent introduction of new techniques via
research labs; however, incorporation of new techniques into academic curricula lags their …

Herein, a simplistic quartz crystal microbalance (QCM) approach for discrimination of
petroleum based fuels is presented. In this regard, a quartz crystal microbalance (QCM) …

In this study an inexpensive near infrared light emitting diodes (NIR LEDs) photometer using
a webcam as a transmittance detector is proposed for the first time. As an illustrative …

Colorimetric characterisation systems based on LEDs and RBG sensors are straightforward
to implement, are highly integrable allowing for portable measurement systems and can be …

The purpose of this study was to evaluate the feasibility of the production of lowcost and
portable Arduino-based spectrophotometer with white LED as a light source for analysing …