Validacija multirezidualne GC-MS metode za določevanje ostankov fitofarmacevtskih sredstev v jagodah

Helena BAŠA ČESNIK

Povzetek


Plinsko kromatografijo sklopljeno z masno spektrometrijo smo uporabili za vpeljavo in validacijo multirezidualne metode za določanje ostankov fitofarmacevtskih sredstev v jagodah. Med validacijo smo postavili meje kvantitativne določitve metode in preverili izkoristek, linearnost, ponovljivost, obnovljivost in merilno negotovost metode. Sodelovali smo tudi v medlaboratorijski primerjavi, da smo preverili točnost metode. Za metodo se je izkazalo, da ustreza namenu. Nato smo z validirano metodo ugotavljali prisotnost ostankov fitofarmacevtskih sredstev v 19 vzorcih jagod. V njih smo določili 5 aktivnih spojin: klorotalonil, ciprodinil, fludioksonil, meatalaksil + metalaksil-M in pirimetanil. Ostanki teh aktivnih snovi so se gibali v območju 0,01 – 0,44 mg/kg.  Preseganja maksimalnih dovoljenih količin ostankov nismo izmerili.

Ključne besede


ostanki pesticidov; GC-MS; jagode; ostanki fitofarmacevtskih sredstev; multirezidualna metoda

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2018.111.2.13

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