Poisoning is usually a result of environmental pollution or chronic intake of foods high in toxic heavy metals. Accurate, precise, and robust analytical methods are required for measurements of heavy metals in foodstuffs to ensure regulatory compliance, maximum product safety and sustainability, and brand protection. We aim to apply elemental mapping system based on laser-induced breakdown spectroscopy that can be deployed in-field to directly measure the distribution of multiple elements in living plants as well as in the soil. We will also use the system to quantitatively detect the element concentrations in soil, which can be used to further understand the element transport between plants and soil. Laser-induced breakdown spectroscopy (LIBS) is a novel technique for analysing and characterizing chemical composition in almost all substances, and it has been investigated for a wide range of applications in material analysis, and the interest in LIBS has grown significantly due to numerous technical advantages compared with other traditional analytical methods. The combination of the portable single pulse LIBS with laboratory-performed dual-pulse LIBS (DPLIBS) and resonance-enhanced LIBS (RELIBS) for decreasing the limit of detection and improving reproducibility of LIBS has great potential for elemental mapping with the advantages of 3-dimensional and multi-elemental mapping, in situ and in vivo measurement. The application of LIBS techniques with chemometric method (PLS-DA) could be a great tool to distinguish pesticide-contaminated samples from pesticide-free samples in a rapid manner even though they have similar elemental compositions. We will also apply the laboratory existing sensing spectroscopic techniques Raman/FTIR chemical mapping in the heavy metal detection in food stuffs and leaf tissues as well in soil.