Defeo, Gustavo Adrián
[VerfasserIn];
Borgheresi, Miria
[VerfasserIn];
De Cicco, Manila
[VerfasserIn];
Carpignani, Bianca
[VerfasserIn]
;
International Union of Leather Technologists and Chemists Societies
False Positives II – Chlorophenols identification towards HPLC-DAD-MS analysis compared with ISO 17070:2015 technique
Erschienen:
Freiberg: Verein für Gerberei-Chemie und -Technik e. V., [2019]
Freiberg: Forschungsinstitut für Leder und Kunststoffbahnen (FILK) gGmbH, [2019]
Erschienen in:XXXV IULTCS Congress 2019 - Proceedings
Beschreibung:
Content:The restriction of certain dangerous substances according to REACH (Registration, Evaluation, Authorisation of Chemicals as well as the Restricted Substances Lists (RSL) requirements promoted by various renowned brands obliges tanneries to everyday more numerous analysis with undesired conflictual situations on false positive tests results. This situation is worsened by the voluntary reduction of requesteddetection limits far below the levels recommended by the accepted ISO methods. On this context, ISO 17070:2015 was extended in its current version from the determination of pentachlorophenol to tetrachlorophenol, trichlorophenol, dichlorophenol and monochlorophenol isomers.Some brands also included under this technique the ortho phenyl phenol (OPP) analysis, requesting a quantification limit below 1 mg/kg for all analytes.The present paper proposes a new HPLC-DAD-MS direct method for the verification of chlorophenols positive cases, and its extension to leather chemicals analysis, as well as the discrimination among falsepositive cases and real positive ones.The paper also illustrates case studies reporting differences in the quantification of the said analytes and the chlorophenol scission in different analytical conditions.Take-Away:False positives verification of the presence of chlorophenols.Quicker method respect to the current ISO 17070:2015 standard.Method reliable on Leather chemicls chlorophenos research.Generation of chlorophenols from certain AOX substances.