Gravimetric deposition of microliter drops with radiometric confirmation

Published

September 9, 2023

Author(s)

Denis E. Bergeron, Richard Essex, Svetlana Nour, Gordon A. Shaw, R. Michael Verkouteren, Ryan P. Fitzgerald

Abstract

A manual gravimetric dispensing technique is demonstrated using a micropipettor modified for use with removeable microcapillaries. Liquid scintillation sources were prepared from a well-characterized 241Am reference solution, providing a radiometric check of dispensed masses. Further experiments confirmed controlled dispensing of drops onto gold foils with losses ≤ 0.34(4) % of the total drop activity. A detailed measurement equation for the weighing technique, including the corrections for evaporation, is presented with a full accounting of associated uncertainties.

Citation

Applied Radiation and Isotopes

Volume

201

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.apradiso.2023.111025

Local Download

Keywords

Milligram mass metrology, quantitative drop deposition, decay energy spectrometry source, Am-241

Citation

Bergeron, D. , Essex, R. , Nour, S. , Shaw, G. , Verkouteren, R. and Fitzgerald, R. (2023), Gravimetric deposition of microliter drops with radiometric confirmation, Applied Radiation and Isotopes, [online], https://doi.org/10.1016/j.apradiso.2023.111025, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936817 (Accessed October 14, 2025)