Detecting trace pollutants used on kiwifruit orchards : a thesis presented in partial fulfilment of the requirements of the degree of Master of Philosophy in Chemistry at Massey University, Manawatu, New Zealand

Abstract

Trace pollutants from sprays used on kiwifruit orchards are difficult to detect, often requiring sophisticated machinery and sample pre-treatment to detect them at very low levels. There are new techniques being created, but a significant portion of these are expensive, complicated, or are sensitive to interferents. Most techniques use some form of chromatography, but this requires expensive equipment and is slow, however, they can successfully detect the pollutants at very low levels. The use of supramolecular cages to bind and detect these pollutants could remove the need for expensive equipment and speed up the detection process. Supramolecular cages can be tailored to specific pollutants, minimizing the potential for interferences. They can also have a variety of detection mechanisms by adding a detection unit to the cage, allowing for simple testing and the use of cheaper equipment. This project will explore the use of supramolecular cages to bind and detect typical pollutants used in the New Zealand kiwifruit industry.