The 16th International Conference on Accelerator Mass Spectrometry

Session

Small C-14 Sample Techniques and Applications

SCT

21 Oct 2024, 15:10

GRAND BALLROOM (宴会厅), 2nd Floor

Conveners

Small C-14 Sample Techniques and Applications

• Xiaomei Xu (University of California, Irvine)

Description

Discussions will focus on milligram to microgram C fractions of natural and anthropogenic biomarkers, compound specific samples and aerosol fractions. Improvements on analytical separations to better isolate C fractions for subsequent AMS analyses, accuracy and precision validation (including blank assessment and background corrections) and/or applications of smaller targets in a wide variety of research areas are welcome.

73. Measurement of ultra-small CO2 samples with an EA-IRMS-AMS system at CologneAMS (SCT-1)

Martina Gwozdz (University of Cologne)

21/10/2024, 15:10

Small C-14 Sample Techniques and Applications

Oral Presentation

In the CRC1211 project "Evolution at the Dry Limit", precise dating analysis of soil samples from the Atacama Desert is essential. These soil samples result in ultra small CO$_2$ samples and have a carbon content of 2-20μg. At CologneAMS ultra-small samples are measured as CO$_2$ with, an elemental analyzer (EA), an isotope ratio mass spectrometer (IRMS) and the 6MV AMS system, by the use of a...

304. FLEXIBLE SAMPLE PREPARATION WITH THE μGRAPHILINE SYSTEM (SCT-2)

Dr Konrad Tudyka (1. Institute of Physics – Centre for Science and Education, Division of Geochronology and Environmental Isotopes, Silesian University of Technology, 2. miDose Solutions)

21/10/2024, 15:30

Small C-14 Sample Techniques and Applications

Oral Presentation

The μGRAPHILINE, introduced in 2024, offers a new, fully automatic graphitization process, enabling rapid, reliable, and precise graphitization using the zinc reduction method for radiocarbon dating. While the majority of radiocarbon samples include bone, wood, charcoal, plant remains, carbonates, and sediments (Dee et al. 2020), there are niche areas of other samples that can be dated with...

150. Assessment of radiocarbon measurement of dissolved organic carbon for small samples by MICADAS (SCT-3)

Wenjing Fu

21/10/2024, 15:50

Small C-14 Sample Techniques and Applications

Oral Presentation

Radiocarbon (14C) composition of dissolved organic carbon (DOC) provides critical constraints on its sources, transformation and cycles. UV-irradiation is considered as an effective approach to oxidize the fresh/salty DOC to CO2 of samples with typical low concentration for high precision radiocarbon measurements. However, the challenge of this method is the complete oxidation of sufficient...

130. Examining Small-Scale Variation: Combining High-Precision Measurements with Statistical Approaches for 14C Dating and Analysis (SCT-4)

Mr Andrea Scifo (Centre for Isotope Research, University of Groningen, Groningen, The Netherlands)

21/10/2024, 16:10

IntCal and Dendrochronology

Oral Presentation

Advancements in high-precision AMS radiocarbon ($^{14}$C) measurements coupled with sophisticated statistical techniques offer a powerful approach to uncovering and utilizing annual features in the $^{14}$C record. In recent years, signatures of rapid increases in cosmogenic $^{14}$C have been successfully used as tools for achieving exact-year dating, with the aid of Classical statistical...