• Home
  • Search Results
  • Accumulation potentials of perfluoroalkyl carboxylic acids (PFCAs) and perfluoroalkyl sulfonic acids (PFSAs) in maize (Zea mays).

Accumulation potentials of perfluoroalkyl carboxylic acids (PFCAs) and perfluoroalkyl sulfonic acids (PFSAs) in maize (Zea mays).

Journal of agricultural and food chemistry (2015-03-31)
Johanna Krippner, Sandy Falk, Hubertus Brunn, Sebastian Georgii, Sven Schubert, Thorsten Stahl
ABSTRACT

Uptake of perfluoroalkyl acids (PFAAs) by maize represents a potential source of exposure for humans, either directly or indirectly via feed for animals raised for human consumption. The aim of the following study was, therefore, to determine the accumulation potential of perfluoroalkyl carboxylic acids (PFCAs) and perfluoroalkyl sulfonic acids (PFSAs) in maize (Zea mays). Two different concentrations of PFAAs were applied as aqueous solution to the soil to attain target concentrations of 0.25 mg or 1.00 mg of PFAA per kg of soil. Maize was grown in pots, and after harvesting, PFAA concentrations were measured in the straw and kernels of maize. PFCA and PFSA concentrations of straw decreased significantly with increasing chain length. In maize kernels, only PFCAs with a chain length ≤ C8 as well as perfluorobutanesulfonic acid (PFBS) were detected. The highest soil-to-plant transfer for both straw and kernels was determined for short-chained PFCAs and PFSAs.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Methanol, suitable for HPLC, ≥99.9%
Sigma-Aldrich
Methanol, anhydrous, 99.8%
Sigma-Aldrich
Methanol, HPLC Plus, ≥99.9%
Sigma-Aldrich
Methanol, HPLC Plus, ≥99.9%, poly-coated bottles
Sigma-Aldrich
Methanol, suitable for HPLC, gradient grade, ≥99.9%
Sigma-Aldrich
Methanol, suitable for HPLC, gradient grade, suitable as ACS-grade LC reagent, ≥99.9%
Supelco
Methanol, analytical standard
Sigma-Aldrich
Methanol, ACS reagent, ≥99.8%
Sigma-Aldrich
Formic acid, reagent grade, ≥95%
Sigma-Aldrich
Magnesium sulfate, anhydrous, ReagentPlus®, ≥99.5%
Supelco
Ammonium acetate, suitable for mass spectrometry (MS), LiChropur, eluent additive for LC-MS
Sigma-Aldrich
Ammonium acetate, for molecular biology, ≥98%
Sigma-Aldrich
Formic acid, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥98%
Sigma-Aldrich
Methanol, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.8% (GC)
Sigma-Aldrich
Formic acid, ACS reagent, ≥96%
Sigma-Aldrich
Ammonium acetate, reagent grade, ≥98%
USP
Methyl alcohol, United States Pharmacopeia (USP) Reference Standard
Sigma-Aldrich
Ammonium acetate, ACS reagent, ≥97%
Sigma-Aldrich
Ammonium acetate solution, for molecular biology, 7.5 M
Sigma-Aldrich
Formic acid, puriss., meets analytical specifications of DAC, FCC, 98.0-100%
Sigma-Aldrich
Magnesium sulfate, anhydrous, reagent grade, ≥97%
Sigma-Aldrich
Magnesium sulfate, BioReagent, suitable for cell culture, suitable for insect cell culture
Sigma-Aldrich
Ammonium acetate, ≥99.99% trace metals basis
Sigma-Aldrich
Methanol, Laboratory Reagent, ≥99.6%
Supelco
Methanol, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
Formic acid, ACS reagent, ≥88%
Sigma-Aldrich
Magnesium sulfate, anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥99.5%
Sigma-Aldrich
Magnesium sulfate solution, for molecular biology, 1.00 M±0.04 M
Sigma-Aldrich
Ammonium acetate, BioUltra, for molecular biology, ≥99.0%
Sigma-Aldrich
Methanol, BioReagent, ≥99.93%