Fully integrated TOC and TNb analysis of estuarine and sea water samples with the Elementar iso TOC cube®

Identifying and quantifying the processes that control the carbon and nitrogen cycling in aquatic systems is important for mitigating urban and agricultural pollution, optimizing environmental policy and understanding global nutrient cycles. The isotopic analysis of dissolved organic carbon (TOC) and total bound nitrogen (TNb) are particularly important to elucidate the different sources, track nutrient cycling processes and help contamination identification.  

Here, we present the δ¹³C performance of the Elementar iso TOC® cube for <5 mg/L carbon TOC concentrations in estuarine river water samples, highlighting a salinity gradient from 2g/L to 25g/L. We also present determination of TOC concentration and δ¹³C TOC in seawater, demonstrating the performance of the iso TOC® cube for the analysis of seawater samples.  

The iso TOC cube® elemental analyser has been developed for fully integrated TOC/TNb isotope ratio analysis. Optimised for precise measurements of TC, TOC, TIC and TNb isotope ratios covering a wide range of applications areas. All types of liquids from drinking water, industrial wastewater, soil leachates, or marine samples are determined reliably and with the highest isotopic precision.