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- W2017242617 abstract "The high sensitivity of secondary ion mass spectrometry (SIMS) for materials residing on a sample surface makes it well suited for detecting the presence of chemicals sprayed onto surfaces. To investigate the possibility that agricultural chemicals could be detected by direct analysis of a plant leaf surface, two common agricultural chemicals, 2,4-D and malathion, were sprayed onto separate plants at label-recommended concentrations (6.7 p.p.t. and 5.0 p.p.t., respectively) and individual plant leaves were analyzed using SIMS over a period of up to 9 weeks after spraying. The plants were located in a greenhouse and were not exposed to rain (or overhead watering) during the experiment. Characteristic negative fragment ions of the chemicals were used as marker peaks; the molecular ions were not obtained. The 2,4-D was easily detectable during the first few days after spraying but only marginally detectable thereafter. The malathion was easily detected up to 9 weeks after spraying. The minimum detectable limit for malathion on this particular plant leaf type was determined to be ∼10 ng. The results indicate that SIMS may be a useful analysis technique when screening for residual chemicals on plant surfaces." @default.
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- W2017242617 date "1991-05-01" @default.
- W2017242617 modified "2023-09-26" @default.
- W2017242617 title "Detection of agricultural chemical residues on plant leaf surfaces with secondary ion mass spectrometry" @default.
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- W2017242617 doi "https://doi.org/10.1002/bms.1200200502" @default.
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