Investigation of total reflection X-ray fluorescence calibration with picoliter deposition arrays

Sparks, Chris; Fittschen, Ursula E. A.; Havrilla, George J.

doi:10.1016/j.mee.2012.04.005

Cited by 8 publications

(3 citation statements)

References 11 publications

(13 reference statements)

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“…The Si K‐lines from the Si‐carrier showed a strong overlap with the P K‐line. Just recently, Sparks et al . showed that detection limits for TXRF analysis of P on Si‐Wafers compared with P on Al 2 O 3 rise over more than one order of magnitude because of this overlap.…”

Section: Methodsmentioning

confidence: 99%

Determination of phosphorus and other elements in atmospheric aerosols using synchrotron total‐reflection X‐ray fluorescence

et al. 2013

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In this study, P and other low Z elements were determined in aerosol particulates from ambient air using synchrotron radiation‐induced total‐reflection X‐ray fluorescence analysis. Atmospheric transport of nutrients such as P or Si to the oceans is a key factor to marine plankton growth. Concentration of these elements in marine air masses is generally low (P < 10 ng/m3). Therefore, analytical procedures enabling for low detection limits are of interest. Because particle size is strongly correlated to its origin and sedimentation, the aerosols were collected with the aid of a low‐pressure Berner impactor, which separates the aerosol particulates in nine size fractions with the smallest fraction from 15 to 30 nm. To be able to determine low Z elements, measurements were performed under vacuum conditions at the FLUO beamline at the ANKA synchrotron. An excitation energy of 3.5 keV near the P K‐edge but below the Ca K absorption edge was chosen to avoid interferences of the P K‐line with the detector escape artifact of the Ca‐Kα line. The result showed P was present in concentration from 2 to 180 ng/m3. Detection limits were found to be generally 0.2–0.3 ng/m3 for a collecting time of 1 h for the aerosols, which is an improvement to detection limits reported in other studies. Other elements such as S, Cl, and Si were determined as well. Si like P is a nutrient for marine plankton (diatoms). S and Cl play an important role in cloud formation, e.g. polar stratospheric clouds. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 99%

Determination of phosphorus and other elements in atmospheric aerosols using synchrotron total‐reflection X‐ray fluorescence

et al. 2013

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“…Patterns of various shapes were tested and showed that a ring-shaped sample was the best option, proved both theoretically and experimentally. Sparks et al 71 showed that a standard calibration wafer for quantiable-contamination control by TXRF could be made, using deposition of pico-litre quantities of equivalent metal-contamination solution on a silicon wafer surface in uniform arrays of residues. A linear calibration curve could be generated within these arrays from increasing concentrations using NIST traceable metal standards and the exact volume of all arrays deposited on a single wafer.…”

Section: Txrf and Related Techniquesmentioning

confidence: 99%

2013 Atomic spectrometry update—A review of advances in X-ray fluorescence spectrometry

West

Ellis

Potts

et al. 2013

J. Anal. At. Spectrom.

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“…Thermal inkjet printing has been used in X-ray fluorescence analysis (XRF). Picoliter droplets have been explored for calibration of microscopic sample deposits in the analysis of atmospheric aerosols [ 37 ] as well as in semiconductor analysis [ 38 , 39 ]. The micro deposits out of standard solutions all have a similar shape [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing

Leppin

Hampel

Meyer

et al. 2020

Sensors

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A quartz crystal microbalance (QCM) is described, which simultaneously determines resonance frequency and bandwidth on four different overtones. The time resolution is 10 milliseconds. This fast, multi-overtone QCM is based on multi-frequency lockin amplification. Synchronous interrogation of overtones is needed, when the sample changes quickly and when information on the sample is to be extracted from the comparison between overtones. The application example is thermal inkjet-printing. At impact, the resonance frequencies change over a time shorter than 10 milliseconds. There is a further increase in the contact area, evidenced by an increasing common prefactor to the shifts in frequency, Δf, and half-bandwidth, ΔΓ. The ratio ΔΓ/(−Δf), which quantifies the energy dissipated per time and unit area, decreases with time. Often, there is a fast initial decrease, lasting for about 100 milliseconds, followed by a slower decrease, persisting over the entire drying time (a few seconds). Fitting the overtone dependence of Δf(n) and ΔΓ(n) with power laws, one finds power-law exponents of about 1/2, characteristic of semi-infinite Newtonian liquids. The power-law exponents corresponding to Δf(n) slightly increase with time. The decrease of ΔΓ/(−Δf) and the increase of the exponents are explained by evaporation and formation of a solid film at the resonator surface.

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Investigation of total reflection X-ray fluorescence calibration with picoliter deposition arrays

Cited by 8 publications

References 11 publications

Determination of phosphorus and other elements in atmospheric aerosols using synchrotron total‐reflection X‐ray fluorescence

Determination of phosphorus and other elements in atmospheric aerosols using synchrotron total‐reflection X‐ray fluorescence

2013 Atomic spectrometry update—A review of advances in X-ray fluorescence spectrometry

A Quartz Crystal Microbalance, Which Tracks Four Overtones in Parallel with a Time Resolution of 10 Milliseconds: Application to Inkjet Printing

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