15. DEVELOPMENT OF INTERNAL LAB SAMPLES STANDARD FOR ISOTOPIC ANALYSES USING CAVITY RINGDOWN SPECTROSCOPY METHOD

Tóm tắt

Water stable isotopes are a good tool for the estimation of the water cycle over the basin and tracer for the origin of the water. Analysis of stable isotope compositions nowadays mainly focuses on estimating the difference between the samples isotope compositions with the known standard isotope compositions. One of the most used methods is Cavity ringdown Spectroscopy method. The known standards are very limited and expensive then internal laboratory standards (ILS) should be prepared with a larger amount for further normal daily samples analysis. This paper described the methods and procedures for preparing the ILS of HUNRE Water Laboratory. Three water samples from three different locations were taken as the candidates' ILS. Those samples were passed procedures to determine the isotope composition's value and uncertainties. The results show that those three samples had covered a wide range of values and were well fitted to linear regression. Those ILS candidates are suited to use as the ILS for further sample analysis