Study of tau‐fluvalinate persistence in honey (original) (raw)

Pest Management Science, 2001

Abstract

The persistence of the acaricide tau‐fluvalinate with time and the factors that can affect its degradation in honey were investigated. Two honey types of extreme pH values (3.85 and 5.40) were spiked with tau‐fluvalinate at two levels (50 and 200 µg kg−1) and incubated at 35 °C. Samples were analyzed in duplicate at various time intervals for up to 248 days. A simple, rapid and accurate method for the determination of tau‐fluvalinate residues in honey is proposed. Tau‐fluvalinate extraction and sample cleanup was carried out using C8 SPE cartridges with dichloromethane as the elution solvent. Analysis of samples was accomplished using gas chromatography with electron‐capture detection (GC–ECD). The overall recovery of the method was 90.25(±0.85)% and the limit of determination 1 µg kg−1. The results showed that tau‐fluvalinate stays stable in honey for more than 8 months, even at 35 °C. The effect of higher temperatures, similar to those used for honey packing, on tau‐fluvalinate pe...

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