Christoph von Holst

ORCID: 0000-0002-5892-2302
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About
Contact & Profiles
Research Areas
  • Pesticide Residue Analysis and Safety
  • Identification and Quantification in Food
  • Meat and Animal Product Quality
  • Mycotoxins in Agriculture and Food
  • Spectroscopy and Chemometric Analyses
  • Toxic Organic Pollutants Impact
  • Analytical Chemistry and Chromatography
  • Antibiotics Pharmacokinetics and Efficacy
  • Analytical chemistry methods development
  • Insect and Pesticide Research
  • Listeria monocytogenes in Food Safety
  • Salmonella and Campylobacter epidemiology
  • Effects and risks of endocrine disrupting chemicals
  • Coccidia and coccidiosis research
  • Advanced Chemical Sensor Technologies
  • Molecular Biology Techniques and Applications
  • Agricultural safety and regulations
  • Pharmacological Effects and Assays
  • Botanical Research and Chemistry
  • Animal Nutrition and Physiology
  • Phase Equilibria and Thermodynamics
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • Chemical Synthesis and Analysis
  • Phytase and its Applications
  • Veterinary medicine and infectious diseases

European Commission
2015-2024

Directorate-General Joint Research Centre
2003-2024

Directorate-General for Health and Food Safety
2024

Feed Control (Norway)
2024

Joint Research Centre
2000-2017

Joint Research Center
2009-2013

Johannes Gutenberg University Mainz
2011

Netherlands Organisation for Applied Scientific Research
2007

Walloon Agricultural Research Centre
2007

Joint Research Centre
2000-2003

A liquid chromatographic (LC) method for the determination of fumonisins B1 (FB1) and B2 (FB2) in corn flakes was collaboratively studied by 23 laboratories, which analyzed 5 blind duplicate pairs each matrix to establish accuracy, repeatability, reproducibility characteristics method. Fumonisin levels ranged from <0.05 (blank) 1.41 microg/g FB1 0.56 FB2, whereas they 1.05 0.46 FB2. The involved double extraction with acetonitrile-methanol-water (25 + 25 50), cleanup through an...

10.1093/jaoac/84.6.1828 article EN Journal of AOAC International 2001-11-01

Five types of fat retainers were investigated for the lipid-free extraction PCBs from fat-containing matrixes using accelerated solvent extraction: florisil, basic alumina, neutral acidic and sulfuric acid-impregnated silica. All generated fat-free extracts when fat/fat retainer ratio was 1:40. Sulfuric silica florisil only that gave completely clear extracts, former not to show any reaction treated with acid after extraction. Using as retainer, on-line cleanup possible, demonstrated...

10.1021/ac010178j article EN Analytical Chemistry 2001-07-12

Deoxynivalenol (DON) is the most common Fusarium mycotoxin occurring in wheat and wheat-derived products, with several adverse toxic effects animals humans. Although bran fractions produced by milling have numerous health benefits, cereal part of grain highest concentration DON, thus representing a risk for consumers. Increased efforts been made to develop analytical methods suitable rapid DON screening.The applicability Fourier transform near-infrared (FTNIR), or mid-infrared (FTMIR)...

10.1002/jsfa.9392 article EN Journal of the Science of Food and Agriculture 2018-10-01

Combating antimicrobial resistance is a top priority worldwide involving concerted action by several high-level institutions and organisations in the health sector. To ensure that meaningful progress achieved, campaigns political initiatives have been launched targeting professionals, industry, farmers, general public. The Regulation (EU) 2019/4 on medicated feed contains provisions for limitation control of contamination non-target compound with 24 antimicrobials. purpose this work was to...

10.1016/j.jpba.2024.116071 article EN cc-by Journal of Pharmaceutical and Biomedical Analysis 2024-02-27

This paper presents a draft protocol for analyzing the results of validation studies qualitative methods detection which is designed to meet three competing goals: (1) give correct answers, (2) have broad scope application, and (3) be accessible wide range users. The can applied by collaborative trial or single-laboratory studies. produces an estimate probability positive response with prediction interval within 95% laboratories (or analytical runs) are expected fall when method in practice....

10.1039/c2ay05719k article EN Analytical Methods 2012-01-01

A 1999 study heightened long-standing concerns over persistent organic pollutant contamination in the Aral Sea area, detecting elevated levels breast milk and cord blood of women Karakalpakstan (western Uzbekistan). These findings prompted a collaborative research aimed at linking such human with evidence food chain area. An international team carried out analyses organochlorine organophosphate pesticides, polychlorinated biphenyls (PCBs), dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs) on...

10.1289/ehp.5907 article EN public-domain Environmental Health Perspectives 2003-04-14

An intercomparison study was conducted to determine the presence of processed animal proteins (PAPs), including meat and bone meal (MBM) from various species, in feed. The performances different methods, such as microscopy, polymerase chain reaction (PCR), immunoassays, a protocol based on iquid chromatography (LC), were compared. Laboratories asked analyze for PAPs all terrestrial animals fish (total PAPs); mammalian PAPs; ruminant porcine PAPs. They free use their method choice. In...

10.1093/jaoac/87.6.1334 article EN Journal of AOAC International 2004-11-01

The commercialization of animal feeds infected by prions proved to be the main cause transmission bovine spongiform encephalopathy (BSE). Therefore, feed bans were enforced, initially for ruminant feeds, and later all farmed animals. development validation analytical methods species-specific detection proteins in has been indicated TSE (Transmissible Spongiform Encephalopathies) Roadmap (European Commission. Encephalopathy) roadmap. URL:...

10.1021/jf0707583 article EN Journal of Agricultural and Food Chemistry 2007-08-29
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