Preprint Article Version 1 This version is not peer-reviewed

Microdrop Deposition Technique: Preparation and Characterization of Diluted Suspended Particulate Samples

Version 1 : Received: 23 May 2018 / Approved: 24 May 2018 / Online: 24 May 2018 (05:43:52 CEST)

A peer-reviewed article of this Preprint also exists.

Macis, S.; Cibin, G.; Maggi, V.; Baccolo, G.; Hampai, D.; Delmonte, B.; D’Elia, A.; Marcelli, A. Microdrop Deposition Technique: Preparation and Characterization of Diluted Suspended Particulate Samples. Condens. Matter 2018, 3, 21. Macis, S.; Cibin, G.; Maggi, V.; Baccolo, G.; Hampai, D.; Delmonte, B.; D’Elia, A.; Marcelli, A. Microdrop Deposition Technique: Preparation and Characterization of Diluted Suspended Particulate Samples. Condens. Matter 2018, 3, 21.

Journal reference: Condens. Matter 2018, 3, 21
DOI: 10.3390/condmat3030021

Abstract

The analysis of particulate matter (PM) in dilute solutions is an important target for environmental, geochemical and biochemical researches. Here we show how the microdrop technology may allow to control, through the evaporation of small droplets, the deposition of insoluble materials dispersed in a solution on a well-defined area with a specific spatial pattern. Using this technology the superficial density of the deposited solute can be accurately controlled. In particular, it becomes possible to deposit an extremely reduced amount of insoluble material -in the order of few μg- on a confined area, thus allowing a relatively high superficial density to be reached within a limited time. In this work we quantitatively compare the microdrop technique for the preparation of particulate matter samples with the classical filtering technique. After having been optimized, the microdrop technique allows to obtain a more homogeneous deposition and limit sample consumption of a factor ~25. This method is potentially suitable for many novel applications in different scientific fields.

Subject Areas

ultra-dilution; droplets; water; evaporation; X-ray fluorescence

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