Fluorometric assays are a proven, very reliable and accurate technique for determining and quantifying a compound or substance in liquid, including tracer dyes. It is therefore a powerful monitoring and research tool in fields such as hydrology, water management and environmental surveying.

ADC BioScientific Ltd. introduces the GFL-1a, the next generation of filter fluorometer for the field analysis of liquid samples.

The GFL-1a has been developed to enable scientists, consultants and civil engineers to analyse samples quicker and easier than ever before. Offering unprecedented portability, unparalleled versatility and uncompromised accuracy.

Weighing only 3kg the truly portable GFL-1a is less than half the weight of traditional transportable fluorometers. The GFL-1a is housed in a rugged water tight case enabling the GFL-1a to access even the most remote field sites.

The GFL-1a is powered by an internal, re-chargeable 12V high capacity, Ni-MH battery, enabling up to 36 hours of continuous field use between charges.

The GFL-1a is suitable for a wide variety of field fluorescence monitoring applications. The unique interchangeable cuvette system allows both discrete and flow through samples to be quickly and easily analysed.

Easily interchangeable filter sets are available for a wide variety of wavelengths to accommodate most tracer dyes, including Rhodamine WT and Fluoroscein, and for a host of other fluorescence applications.

Utilising the latest in miniaturised electronics and fluorescence detection technology the GFL-1a is able to provide the performance and accuracy associated with a laboratory based system in a field portable device.

A low power consumption LED solid-state source provides fast excitation of a compound in liquid. A silicon photo diode detector is used to provide outstanding data stability. Whilst a novel compact dual beam optical path provides both a reference and measurement channel to compensate for temperature, source and detector variations.

Single or multipoint calibration curves can be generated using known standards allowing real-time concentrations to be displayed. The GFL-1a can monitor compounds down to PPT levels. For example 10 PPT for fluorocein and 30 PPT for Rhodamine WT.