Thomas Prohaska

Thomas Prohaska
Montanuniversität Leoben · Chair of General and Analytical Chemistry

Professor

About

264
Publications
111,249
Reads
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7,976
Citations
Citations since 2017
63 Research Items
3960 Citations
20172018201920202021202220230200400600
20172018201920202021202220230200400600
20172018201920202021202220230200400600
20172018201920202021202220230200400600
Additional affiliations
October 2018 - present
Montanuniversität Leoben
Position
  • Chair
October 2000 - October 2018
Universität für Bodenkultur Wien
Position
  • Professor (Associate)
December 1995 - October 2000
University of Natural Resources and Life Sciences Vienna
Position
  • Research Assistant

Publications

Publications (264)
Article
Full-text available
Seven plant certified reference materials (NIST SRM1515 Apple Leaves, NIST SRM1547 Peach Leaves, BCR-129 Hay Powder, BCR-670 Aquatic Plant, GBW07603 Bush Twigs and Leaves, GBW10015 Spinach Leaves and NCS ZC73036a Green Tea) were analysed for their mass fractions of 48 elements by inductively coupled plasma tandem-mass spectrometry (ICP-MS/MS): Li,...
Article
Full-text available
The potential of enriched Pb ( ²⁰⁴ Pb) was assessed to monitor pathways of trace levels of Pb in the pg range within the human body via isotope pattern variation in situations where natural lead cannot be used as a tracer due to regulatory limitations. Isotope ratio measurements were accomplished by means of (multi-collector) inductively coupled pl...
Article
The table of standard atomic weights (TSAW) provides of the numbers included in all reprints of the periodic tables of the elements, in all textbooks in schools, high schools and universities, found on the internet, and numerous databases [1]. Whenever one needs to relate masses of an element to molar quantities, standard atomic weights come into t...
Article
Full-text available
In inductively coupled plasma mass spectrometry, the most abundant Ca isotope ( ⁴⁰ Ca) suffers from isobaric interference with argon, hindering the potential for low detection limits of Ca. A powerful approach is to remove the interference by using a reaction gas in a reaction cell. Ammonia (NH 3 ) has proven to be an effective reaction gas by proc...
Article
Full-text available
Following the reviews of atomic-weight determinations and other cognate data in 2015, 2017, 2019 and 2021, the IUPAC (International Union of Pure and Applied Chemistry) Commission on Isotopic Abundances and Atomic Weights (CIAAW) reports changes of standard atomic weights. The symbol Ar°(E) was selected for standard atomic weight of an element to d...
Article
Full-text available
Visualization and quantification of corrosion processes is essential in materials research. Here we present a new approach for 2D spatiotemporal imaging of metal corrosion dynamics in situ. The approach combines time-integrated Mg²⁺ flux imaging by diffusive gradients in thin films laser ablation inductively coupled plasma mass spectrometry (DGT LA...
Article
Full-text available
Piscivorous birds in aquatic ecosystems exert predation pressure on fish populations. But the site‐specific impact on fish populations, including stocked and commercially used fish species, remains disputed. One of the key questions for the management of piscivorous birds and fish is determining the origin of prey and thus which fish populations ar...
Article
Full-text available
A method using diffusive gradients in thin films (DGT) for the accurate quantification of trace-level (μg L–1) Sr and Pb concentrations and isotope ratios [δSRM 987(87Sr/86Sr) and δSRM 981(207Pb/206Pb)] in labile, bioavailable element fractions in soils is reported. The method is based on a novel poly(tetrafluoroethylene) (PTFE) membrane binding la...
Article
Full-text available
Although there are common and well-established bioindicator organisms and tissues, there is still a need for reliable and sensitive bioindicators in aquatic environments. In the present pilot study, calcified structures in fish were applied as indicators of metal exposure in combination with commonly used fish soft tissues and intestinal parasites,...
Article
Trace elements integrated into fish fin rays from the ambient environment may represent a permanent record of the environmental conditions that an individual has experienced throughout its lifetime. Fish from hatcheries used for stocking may therefore carry a natural intrinsic tag of their origin, which can be then later used for assessing the effi...
Preprint
The focus of this study was to assess the potential of otolith microchemistry as a fishery management tool for different European freshwater fish species in an Alpine foreland with a diverse range of different water bodies but low geological variation. ⁸⁷ Sr/ ⁸⁶ Sr isotope and Sr/Ca ratios in water samples from 26 habitat sites in a pre-alpine catc...
Article
Full-text available
Lead exposure can cause substantial organ damage. Enteral lead absorption may be reduced by concomitant intake of clinoptilolite tuff, a zeolite from natural sources. This study aimed to assess the effect of purified clinoptilolite tuff (G-PUR) on enteral lead uptake in adults using stable lead isotope ²⁰⁴Pb as a tracer. In this randomized, placebo...
Article
Full-text available
Ca isotopes have gained increasing interest as a diagnostic tool for bone diseases due to the variations in abundances as a consequence of changes in bone-mineral balance. Optimized Ca/matrix separation prior to analysis is a prerequisite for reliable isotope ratio measurements in complex biological matrices such as blood, serum, or urine. The onli...
Article
Beethoven · Hair analysis · LA-ICP-MS · SEM · Iatrogenic lead intoxication
Article
Full-text available
Two different strands of hair taken from Beethoven’s head after his death were examined for heavy metals using scanning electron microscopy (SEM) and laser ablation-ICP-MS (inductively coupled plasma–mass spectroscopy). The results revealed the presence of small lead particles on the surface of Beethoven’s hairs and fluctuating lead levels in hair...
Article
The focus of this work is a comprehensive overview of analytical techniques for elemental and isotopic analyses applied in forensic science (i.e. linking crime scene evidence to a crime by applying analytical techniques). The article provides a short description of the spectroscopic techniques and an overview of selected applications. In addition t...
Conference Paper
Smartphones contain many important metals. Yet, public data about the exact content are limited. In this study, the abundances of 53 metals and semi-metals in smartphones were determined. The ten most abundant metals measured are Fe, Si, Mg, Al, Cu, Ni, Cr, Zn, Sn, and Sr; these comprise already 93 % of the total weight of the investigated 53 metal...
Data
Tracking shot using micro-CT scans through the central parts of the upper lateral incisors (i2) ind1 to the left, ind2 to the right. Red arrows mark the neonatal lines and white arrows mark accentuated lines
Article
Full-text available
The Upper Palaeolithic double burial of newborns and the single burial of a ca. 3-month-old infant uncovered at the Gravettian site of Krems-Wachtberg, Austria, are of paramount importance given the rarity of immature human remains from this time. Genome-wide ancient DNA shows that the male infants of the double grave are the earliest reported case...
Article
Full-text available
We describe a method for two-dimensional (2D) visualization and quantification of the distribution of labile (i.e., reversibly adsorbed) inorganic nutrient (e.g., P, Fe, Mn) and contaminant (e.g., As, Cd, Pb) solute species in the soil adjacent to plant roots (the ‘rhizosphere’) at sub-millimeter (~100 μm) spatial resolution. The method combines si...
Article
Full-text available
Abstract Because of its acidic and oxidative nature, iron gall ink promotes the endogenous degradation of paper manuscripts. Mechanical damage in areas of concentrated ink application or along mechanically stressed edges or folds results in problems during storage and handling. So far, such strongly degraded areas have usually been stabilized local...
Article
Full-text available
53 metallic elements from smartphones were investigated with regard to metal prices, metal production, and content in comparison to mined ores. The metal content of the 7.42 billion smartphone devices sold from 2012 to 2017 could theoretically maintain the global supply for 91 days for Ga, 73 days for Ta, 23 days for Pd, 14 days for Au, and 6 days...
Article
An exploratory study for verifying regional geographical origin of carrots from specific production regions in Austria (“Genussregionen”) was performed by combining chemical fingerprinting methods, namely n(⁸⁶Sr)/n(⁸⁷Sr) isotope amount ratios, multi-elemental and metabolomic pattern. Chemometric classification models were built on individual and co...
Article
Full-text available
Trace element concentrations in the rhizosphere were quantified to better understand why soil liming often fails to reduce cadmium (Cd) uptake by plants. Maize seedlings were grown on a soil with natural background levels of Cd and zinc (Zn). Soil liming increased soil pH from 4.9 to 6.5 and lowered the soil solution free ion activities by factor 7...
Preprint
Full-text available
Because of its acidic and oxidative nature, iron gall ink promotes the endogenous degradation of paper manuscripts. Mechanical damage in areas of concentrated ink application or along mechanically stressed edges or folds results in problems during storage and handling. So far, such strongly degraded areas have usually been locally stabilized with t...
Article
Sr isotopes were applied to identify possible allochthony of skeletal remains retrieved from Tomb 26 of the pharaonic cemetery SAC5 on Sai Island (Nubia). Tooth enamel of nine individuals, including the Overseer of Goldsmiths Khummose and his presumed ‘wife’, dating from the New Kingdom, were investigated to gain information whether these individua...
Article
Full-text available
This study presents a chemometric protocol for the determination of site-specific elemental and strontium isotopic fingerprints in sturgeon caviar. The elemental and strontium isotopic composition of water, fish feed, salt, raw (i.e., unsalted) and salted sturgeon caviar samples from six fish farms in Europe and Iran was determined by (multi-collec...
Poster
Full-text available
In diesem Beitrag wird ein systematisch analytischer Ansatz zur Charakterisierung und Bestimmung der Quellen von makroskopischen nichtmetallischen Einschlüssen in Stählen durch eine Kombination von lichmikroskopischer Untersuchung, Mikro- und Bulkanalyse präsentiert. Erfahrungsgemäß kann anhand der Morphologie der Einschlüsse zunächst eine erste gr...
Article
Full-text available
Copper-based fungicides have been used for a long time in viticulture and have accumulated in many vineyard soils. In this study, incrementing Cu(OH)2-based fungicide application from 0.05 to 5 g Cu kg⁻¹ on two agricultural soils (an acidic sandy loam (L, pH 4.95) and an alkaline silt loam (D, pH 7.45)) resulted in 5 times more mobile Cu in the aci...
Article
Elemental and isotopic pattern of n(87Sr)/n(86Sr) and δ88Sr/86SrSRM987 were used to characterise groundwater and recharge of saline ponds in a clastic aquifer in East Austria. Therefore, shallow, artesian and thermal groundwaters of the investigated aquifer along with rainfall and rivers were analysed using (MC) ICP-MS. The n(87Sr)/n(86Sr) ratio an...
Article
Full-text available
Surveys conducted in Eilat’s upper mesophotic coral ecosystem (MCE) revealed protruding columnar calcareous structures with a Sinularia octocoral colony growing atop of each. The current study addressed the hypothesis that these colonies produce spiculites, and sought to determine (a) the spatial occurrence and dimensions of the spiculite-forming c...
Article
This paper presents a combination of elemental and isotopic spatial distribution imaging with near-infrared hyperspectral imaging (NIR-HSI) to evaluate the diagenetic status of skeletal remains. The aim is to assess how areas with biogenic n(⁸⁷Sr)/n(⁸⁶Sr) isotope-amount ratios may be identified in bone material, an important recorder complementary...
Article
This paper presents a systematic investigation of the effects of Ca on the matrix separation of Sr and Pb and subsequent isotope-amount ratio measurements using a variety of synthetic solutions and reference materials with varying Ca content during the application of an automated analyte/matrix separation approach. The separation method based on th...
Article
Iron gall inks are known to be detrimental to the permanence of historic documents. Among the transition metals present, copper is the greatest threat and an open challenge due to the lack of Cu-specific treatments. In this study, we address the inhibition of copper by comparing extraction (a newly proposed glucose-based treatment) vs. chelation (p...
Poster
Full-text available
Verification of the geographic origin of food using chemical information of food is an emerging tool in the fight against food fraud. The 87Sr/86Sr isotope ratio is a particularly useful tracer for food provenance as it allows establishing a direct link between the sample and its geographic environment. However, food processing can significantly al...
Article
Full-text available
A versatile approach to determine the elemental content of more than 50 elements in different components of electronic devices on the example of smartphones was developed. The analytical protocol is based on accurate disassembly of smartphones, a single processing microwave-assisted acid digestion followed by ICP-OES and ICP-MS measurements. Method...
Poster
Full-text available
Sturgeon caviar is one of the most expensive commodities in the world. Caviar production and trade are strictly regulated by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) including legal caviar identification using a uniform labelling system. Isotopic pattern of strontium, nitrogen and sulfur and the el...
Article
Die Diskussion über Themen wie „Rohstoffe aus Konfliktregionen“ und „nachhaltiger Bergbau“ hat dazu geführt, dass die Hersteller von Geräten der Informations- und Kommunikationstechnologien (IKT) verstärkt mögliche sozioökonomische und ökologische Aspekte des Rohstoffabbaus und der Produktionsstufen berücksichtigen müssen. Auch die mediale Berichte...
Conference Paper
Full-text available
The determination of the geographical origin of food products via a chemical fingerprint is an on-going challenge that scientists have explored in the last decades by implementing various analytical techniques. The aim is both to provide reliable and objective tools to fight food fraud and to protect the quality of regional products. The multieleme...
Article
Full-text available
A systematic investigation of single particle inductively coupled plasma mass spectrometry (spICP-MS) signal profiles recorded with normal (ms-range) and high (μs-range) temporal resolution for spherical and rod-shaped gold nanoparticles was performed. The experiments with nanorods were carried out on hemispherically capped cylindrical particles sy...
Article
In this study, the information that can be obtained by combining normal and high resolution single particle ICP-MS (spICP-MS) measurements for spherical bimetallic nanoparticles (BNPs) was assessed. One commercial certified core-shell Au-Ag nanoparticle and three newly synthesized and fully characterized homogenous alloy Au-Ag nanoparticle batches...
Article
Isotope pattern deconvolution (IPD) was used to determine the contribution of different Sr sources to the Sr isotopic composition of natural samples on the example of sturgeon caviar and otoliths. For this purpose, the Sr isotopic composition of raw and salted sturgeon caviar, otoliths as well as water, fish feed and salt (representing the assumed...
Article
Full-text available
The investigation of the fractionation of S compounds in forest soils is a powerful tool for interpreting S dynamics and S biogeochemistry in forest ecosystems. Beech stands on high pH (nutrient-rich) sites on Flysch and on low pH (nutrient-poor) sites on Molasse were selected for testing the influence of stemflow, which represents a high input of...
Article
A novel, fast and reliable sample preparation procedure for the simultaneous separation of Sr, Pb, and Nd has been developed for subsequent isotope ratio analysis of sediment digests. The method applying a fully automated, low-pressure chromatographic system separates all three analytes in a single-stage extraction step using self-packed columns fi...
Article
A fingerprinting strategy based on genetic (simple sequence repeat) and geochemical (multielement and ⁸⁷Sr/⁸⁶Sr ratio) analysis was tested to prove the geographical origin of high-quality Italian products “White Asparagus from Bassano del Grappa” and “Green Pistachio from Bronte”. Genetic analysis generated many polymorphic alleles and different sp...
Article
Full-text available
In the present paper, first results of the influence of the degradation of biodegradable materials on the hardness of the bone are presented in detail. For this purpose, different materials (Mg, Ti and biopolymers) were implanted into the femora of growing rats and bone cross sections were examined for the micro-hardness (MH). The aim of the presen...
Article
Statement of significance: Magnesium alloys as bone implants have faced increasing attention over the past years. In vivo degradation and metabolism studies of these implant materials have shown the promising application in orthopaedic trauma surgery. With advance in Mg research it has become increasingly important to monitor the fate of the impla...
Article
Full-text available
The performance and validation characteristics of different single collector inductively coupled plasma mass spectrometers based on different technical principles (ICP-SFMS, ICP-QMS in reaction and collision modes, and ICP-MS/MS) were evaluated in comparison to the performance of MC ICP-MS for fast and reliable S isotope ratio measurements. The val...
Article
Full-text available
A diffusive gradient in thin films (DGT) technique, based on a strongly basic anion exchange resin (Amberlite IRA-400), was successfully tested for 34S/32S analysis in labile soil sulfate. Separation of matrix elements (Na, K, and Ca) that potentially cause non-spectral interferences in 34S/32S analysis by MC ICP-MS (multi-collector inductively cou...
Article
This study is dedicated to the systematic investigation of the effect of interferences on Sr isotopic analyses in biological apatite and carbonate matrices using laser ablation multicollector inductively coupled plasma mass spectrometry (LA-MC ICP-MS). Trends towards higher ⁸⁷Sr/⁸⁶Sr ratios for LA-MC ICP-MS compared to solution-nebulization based M...