Sample interview questions: Can you discuss the concept of laser-induced breakdown detection and its impact on environmental analysis?
Sample answer:
Laser-induced breakdown detection (LIBD) is a powerful analytical technique used in environmental analysis to identify and quantify trace elements or pollutants in various samples. LIBD involves the use of a high-energy laser pulse focused onto the sample, which results in the formation of a plasma plume. This plasma plume emits characteristic light that can be analyzed to determine the elemental composition of the sample.
One of the primary advantages of LIBD in environmental analysis is its ability to provide rapid and real-time analysis of samples. The laser-induced plasma can be generated within microseconds, allowing for high-throughput analysis of a large number of samples. This capability is particularly beneficial in situations where quick analysis is required, such as during environmental monitoring or emergency response scenarios.
Furthermore, LIBD offers excellent sensitivity and detection limits, enabling the identification and quantification of trace elements at very low concentrations. This is crucial in environmental analysis, where the presence of even small amounts of certain contaminants can have significant impacts on ecosystems and human health. The sensitivity of LIBD can be further enhanced by coupling it with techniques like laser-induced fluorescence or time-resolved spectroscopy.
LIBD also enables non-destructive analysis, as the laser pulse can be focused onto the sample without causing any damage. This is advantageous when analyzing precious or limited samples, as it allows for subsequent analyses or further investigations to be carried out on the same sample.
In terms of environmental applications, LIBD has been extensively used for the analy… Read full answer