# Understanding Intra-day and Inter-day Variation in LIBS

Presented by:
James Curran University of Auckland
Date:
Thursday 10th November 2016 - 16:15 to 17:00
Venue:
INI Seminar Room 1
Abstract:
Co-authors: Anjali Gupta (University of Auckland), Chris Triggs (Universtity of Auckland), Sally Coulson (ESR)

LIBS (laser induced breakdown spectroscopy) is a low-cost alternative and highly portable instrument that can be used in forensic applications to determine elemental composition. It differs from more traditional instruments such as ICP-MS and $\mu$-XRF in that the output is a spectrum rather than the concentration of elements. LIBS has great appeal in forensic science but has yet to enter the mainstream. One of the reasons for this is a perceived lack of reproducibility in the measurements over successive days or weeks. In this talk I will describe a simple experiment we designed to investigate this phenomenon, and the consequences of our findings. The analysis involves both classical methodology and a simple Bayesian approach.

[ The video of this talk is temporarily unavailable. Please try later. ]

Presentation Material: