This study established an ultra high performance liquid chromatography-tandem mass spectrometry method for the determination of alkylphenol polyoxyethylene (APEOs) in pesticide formulations. APEOs were separated on a Waters-BEH C18 column, measured by a multi-reaction monitoring mode (MRM) with an electrospray positive ion source (ESI+), and quantified by an external standard method. The matrix standard curve of APEOs (n=3-20) in aqueous solutions, water emulsion, suspension concentrate, emulsifiable concentrate,granules and wettable powder had a good linearity in the range of 0.047-1β503.6βmg·kg-1with the correlation coefficient (r) between 0.996β1 and 0.999β9. The recovery of APEOs spiked in the level of 0.5-1β503.6βmg·kg-1 ranged from 83.8-120.4% with relative standard deviation (RSD) of 0.6-13.7%, and the limits of quantity (LOQs) of 0.5~150.4βmg·kg-1. Among the 51 pesticide formulations used in tea gardens, the percentage of Octylphenol ethoxylates (OPEOs) was less than 0.5%. The mass fraction of nonylphenol ethoxylates (NPEOs) was ND-32.1% and the detection rate was 90.2%, indicating the wide use of NPEOs in pesticides in tea gardens.
LIN Qin
,
ZHOU Li
,
LUO Fengjian
,
YANG Jie
,
WANG Xinru
,
SUN Hezhi
,
YANG Mei
,
CHEN Zongmao
. Determination of Alkylphenol Ethoxylates in Agrochemicals for Tea Garden by UPLC-MS/MS[J]. Journal of Tea Science, 2019
, 39(1)
: 105
-113
.
DOI: 10.13305/j.cnki.jts.2019.01.012
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