Measurements of isotope ratios are predominantly made with reference to standard
specimens that have been characterized in the past. In the 1950s, the carbon isotope ratio …

Atmospheric particulate matter (PM) is a complex mixture of many different substances and
requires a suite of instruments for chemical characterization. Fourier transform infrared (FT …

Spectroscopic techniques have been increasingly applied to determine stable carbon
isotopic compositions of different target compounds. Although mass spectrometry based …

For the past two decades, the measurement of nitrous oxide (N 2 O) isotopocules–
isotopically substituted molecules 14 N 15 N 16 O, 15 N 14 N 16 O and 14 N 14 N 18 O of …

We present the global research landscape which aims to deliver a measurement
infrastructure to underpin atmospheric observations of key greenhouse gases governing …

Using laser absorption spectrometry for the measurement of stable isotopes of atmospheric
CO 2 instead of the traditional isotope ratio mass spectrometry method decreases sample …

We have developed a method to calculate the fractional distribution of CO 2 across all of its
component isotopologues based on measured δ 13 C and δ 18 O values. The fractional …

Unambiguous detection of the clumped carbon dioxide isotopologue 13C16O18O with
isotope ratio mass spectrometry is difficult due to isobaric interference on m/z= 47. We …

The isotopic composition of atmospheric trace gases such as CO 2 and CH 4 provides a
valuable tracer for the sources and sinks that contribute to atmospheric trace gas budgets. In …

In geochemical applications, carbon dioxide isotope abundance should be accurately
measured. However, many challenges must be overcome in field applications, such as the …