Pesticides in Baby Food: Sample Extraction Methods
Luke Extraction as per PAM1 (Pesticide Analytical Manual Vol.1)
- 160 ml of filtrate instead of 80 ml. Final volume 10 ml.
- ECD Clean up: 2ml acetone extract and evaporated with N2 to dryness.
Dissolve in Petroleum ether. Transfer pet ether to pre-conditioned Supelco 1gm Florisil column, and elute with 10ml 10% acetone in pet ether. Evaporate to 5ml final volume.
N-Methyl Carbamate (HPLC)
Luke Extraction as per PAM1, then filter 1 ml acetone extract through 0.45 filter into autosampler vial.
Organosulfur Pesticides (Propargite)
Luke Extraction as per PAM1
Luke Extraction as per PAM1, then use 5ul of filtered acetone extract.
- 500ml methanol
- 450ml Water
- 50ml Acetic Acid
- 4gm Sodium Acetate Trihydrate
Eluent 2: 70:30 IP Solution:methanol (confirmations)
Luke extraction as per PAM1, then 2 ml of acetone extract was evaporated to dryness with N2, dissolved in 1 ml of methanol and 1 ml of IP solution is added. The sample is set overnight to convert any residual benomyl to MBC.
- Eluent: 70:30 IP solution: methanol
- IP solution:1 gm Sodium Decanesulfonic acid, 7ml H3PO4, 10ml triethylamine to 1 l water.
100 grams of product was extracted in methanol-aqueous sodium acetate solution, filtered with diatomaceous earth and eluted in methylene chloride as per Krause, JOAC 72: 6,1989.
- Eluent: 0.025 M Phosphoric Acid