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Nürnberg, Germany

Chaintreau A.,Firmenich | Cicchetti E.,Firmenich | David N.,135 Avenue Charles de Gaulle | Earls A.,LGC Ltd. | And 7 more authors.
Journal of Chromatography A | Year: 2011

Previous publications investigated different data treatment strategies for quantification of volatile suspected allergens by GC/MS. This publication presents the validation results obtained on "ready to inject" samples under reproducibility conditions following inter-laboratory ring-testing. The approach is based on the monitoring of three selected ions per analyte using two different GC capillary columns. To aid the analysts a decisional tree is used for guidance during the interpretation of the analytical results. The method is evaluated using a fragrance oil concentrate spiked with all suspected allergens to mimic the difficulty of a real sample extract or perfume oil. At the concentrations of 10 and 100. mg/kg, imposed by Directive 76/768/EEC for labeling of leave-on and rinse-off cosmetics, the mean bias is +14% and -4%, respectively. The method is linear for all analytes, and the prediction intervals for each analyte have been determined. To speed up the analyst's task, an automated data treatment is also proposed. The method mean bias is slightly shifted towards negative values, but the method prediction intervals are close to that resulting from the decisional tree. © 2011 Elsevier B.V. Source

Protz S.,TUV Rheinland LGA Products GmbH | Jungnickel F.,TUV Rheinland LGA Products GmbH | Galinkina J.,TUV Rheinland LGA Products GmbH | Maciej B.,TUV Rheinland LGA Products GmbH | And 2 more authors.
Gefahrstoffe Reinhaltung der Luft | Year: 2010

The following results are based on standardized emission test chamber examinations and subsequent GC/MS analytical measurement of substance specific and total VOC contents of cubic and equally sized Polyurethane (PUR) test samples. They reveal that different zones within a selected processed PUR foam block exist which vary in analyzed VOC emission values. Moreover, analytical test results show that low-emitting block areas are located in the centre of the block. Source

Maciej B.,TUV Rheinland LGA Products GmbH | Maciej B.,Bundesinstitut For Risikobewertung Bfr | Maciej B.,LGA Products GmbH | Hagen U.,TUV Rheinland LGA Products GmbH | Schelle C.,TUV Rheinland LGA Products GmbH
Deutsche Lebensmittel-Rundschau | Year: 2011

Children's exposure with respect to formaldehyde emissions from wooden toys may be associated with various health risks due to the chemical's adverse toxicological metabolic profile in humans. In compliance with the current European chemical legislation formaldehyde is classified as skin sensitizer and with limited evidence of a carcinogenic effect. Consequently, the assessment of the exposure extent concerning users of formaldehyde emitting toy articles can exclusively be based on reliable and scientifically sound testing methods with specific regard to wood based materials applied in the manufacturing process. In the scope of formaldehyde emission evaluations due to wooden toys both the authoritative test chamber method in accordance with the German Chemical Prohibition Decree and the bottle method as specified within the European toy safety standard are available. The presented scientific research work outlines which physical parameters may influence formaldehyde emission test results generated by the bottle method and if a correlation can be derived from test data on the basis of both examination methods. Moreover, an alternative testing approach following to the referenced test chamber method is presented which will contribute to a reduction of methodically related disadvantages of the standard conformable chamber procedure. Source

Frank G.,TUV Rheinland LGA Products GmbH | Kolb M.,TUV Rheinland LGA Products GmbH | Schelle C.,TUV Rheinland LGA Products GmbH
Gefahrstoffe Reinhaltung der Luft | Year: 2013

Compact fluorescent lights (CFL) represent an illumination alternative due to successive ban of traditionally used filament bulbs. The national and European enforcement of legally driven substitution and conversion to usage of CFL is associated with the assessment of a potential hazard risk arising from pollutant emissions. The article summarizes test results based upon test chamber examinations of randomly selected and commercially available CFL in comparison to illuminants produced by one specific manufacturer and directly provided from the routine production process (from identical batch). The CFL emission profiles detected under condition of use are assessed with regard to a potential indoor air contamination. The findings indicate that emission shares of detectable and quantifiable volatile organic compounds decline with increasing CFL usage period to hygienically unobjectionable indoor air concentrations. Differing test results were observed with regard to the emission profile of single emitters including released CMR substances, to emission rates concerning the initial switch-on period from 1 hour up to approximately 24 hours and to batch homogeneity. Source

With regard to test chamber examinations of leather samples to be evaluated qualitatively, analytically detectable total emissions of volatile and semi-volatile organic compounds (VOCs, SVOCs) will be decisively affected by selected conditioning parameters such as temperature, relative humidity, loading factor and area-specific air exchange rate. Moreover, the exposition mode of placing a leather sample into a test chamber has a crucial impact on quantifiable VOC test chamber concentrations determined at well-defined sampling points in time. Established test methods focus either on the approach of rear to rear testing of the seamed leather specimen or on the specific setting that both grain and the reverse velour side are exposed to emit volatiles. The current article points out which value deviations may arise with regard to quantifiable test chamber concentrations and calculated emission rates respecting different sample modifications. The analytical VOC determination was based upon gas chromatography and mass spectroscopy (GC/MS). The examinations reveal that the influence of diversified air exchange rates declines with an increasing test period. In the scope of sample surface exposure the reverse velour side dominates the contribution to total emission. Source

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