PMID- 25203115 OWN - NLM STAT- MEDLINE DCOM- 20150609 LR - 20191210 IS - 1944-0057 (Electronic) IS - 1944-0057 (Linking) VI - 31 IP - 10 DP - 2014 TI - Multi-commutated fluorometric optosensor for the determination of citrinin in rice and red yeast rice supplements. PG - 1744-50 LID - 10.1080/19440049.2014.949874 [doi] AB - Citrinin is a toxic secondary metabolite first isolated from Penicillium citrinum, although is also produced by other species of Penicillium and Aspergillus. It has highly toxic, mutagenic, teratogenic and carcinogenic properties and is often found in crops, vegetables and fruit. To our knowledge there is no specific legislation on maximum levels permitted for citrinin, so no official analytical method is currently available for its determination. Our laboratory developed a fluorometric flow-through optosensor using Sephadex SPC-25 as solid support. Multi-commutated flow injection analysis was used for the construction of the manifold and for handling solutions. In this way, we minimised waste generation and human intervention, which are critical aspects when dealing with highly toxic compounds such as citrinin. The optimum excitation/emission wavelengths were set at 330/494 nm; the calibration curve was linear in the concentration range 35-900 ng ml(-)(1). A detection limit of 10.5 ng ml(-)(1) and relative standard deviations (RSDs) lower than 3% were obtained. The developed optosensor was applied to the determination of citrinin in rice and dietary supplements containing red yeast rice. FAU - Jimenez-Lopez, J AU - Jimenez-Lopez J AD - a Department of Physical and Analytical Chemistry, Faculty of Experimental Sciences , University of Jaen , Jaen , Spain. FAU - Llorent-Martinez, E J AU - Llorent-Martinez EJ FAU - Ortega-Barrales, P AU - Ortega-Barrales P FAU - Ruiz-Medina, A AU - Ruiz-Medina A LA - eng PT - Comparative Study PT - Evaluation Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140909 PL - England TA - Food Addit Contam Part A Chem Anal Control Expo Risk Assess JT - Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment JID - 101485040 RN - 0 (Carcinogens, Environmental) RN - 3S697X6SNZ (Citrinin) SB - IM MH - Analytic Sample Preparation Methods MH - Automation, Laboratory MH - Calibration MH - Carcinogens, Environmental/*analysis/isolation & purification MH - Citrinin/*analysis/isolation & purification MH - Dietary Supplements/*analysis/economics MH - Fermentation MH - Fluorometry MH - *Food Contamination MH - Food Handling MH - Food Inspection/*methods MH - Limit of Detection MH - Liquid-Liquid Extraction MH - Monascus/chemistry/metabolism MH - Oryza/*chemistry/economics/microbiology MH - Reproducibility of Results MH - Seeds/*chemistry/microbiology MH - Spain OTO - NOTNLM OT - food OT - luminescence OT - multi-commutation OT - mycotoxin OT - rice OT - solid-phase spectroscopy EDAT- 2014/09/10 06:00 MHDA- 2015/06/10 06:00 CRDT- 2014/09/10 06:00 PHST- 2014/09/10 06:00 [entrez] PHST- 2014/09/10 06:00 [pubmed] PHST- 2015/06/10 06:00 [medline] AID - 10.1080/19440049.2014.949874 [doi] PST - ppublish SO - Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2014;31(10):1744-50. doi: 10.1080/19440049.2014.949874. Epub 2014 Sep 9.