13-6 Arsenic and Selenium Concentrations in Central Coast California Soils and Wine.

See more from this Division: Students of Agronomy, Soils and Environmental Sciences (SASES)
See more from this Session: Symposium--Undergraduate Research Symposium Contest - Oral II

Sunday, November 15, 2015: 1:30 PM
Minneapolis Convention Center, M100 D

Catherine Lehman1, Rebecca F. Graham2, Florence Miller3, Tyler Brown4, Nico Navarro5, Matt Macedo5, Joshua Sanchez6, Charlie Neal5, Dylan Estes5, Bradley Kurtz5, Christopher S. Appel7, Craig P. Stubler4, Adrian Broz8 and Scott Anderson5, (1)California Polytechnic State University-San Luis Obispo, Folsom, CA
(2)Department of Crop Sciences, University of Illinois-Urbana-Champaign, Urbana, IL
(3)Cal Poly Environmental Sciences CLub, San Luis Obispo, CA
(4)California Polytechnic State University-San Luis Obispo, San Luis Obispo, CA
(5)Cal Poly Environmental Sciences Club, San Luis Obispo, CA
(6)California Polytechnic State University-San Luis Obispo, Avila Beach, CA
(7)1 Grand Avenue, California Polytechnic State University Earth & Soil Sciences, San Luis Obispo, CA
(8)California Polytechnic State University Earth & Soil Sciences, San Luis Obispo, CA
Abstract:
Arsenic (As) and selenium (Se) are both naturally occurring soil constituents that, when absorbed by crops in high quantities, can render the fruits of the harvest toxic to people. This study was conducted to determine the concentration of As and Se in the soil and wine of a California Central Coast vineyard and compare these levels to the maximum allowable levels of these elements dictated by several regulatory agencies. The effect of sampling location and wine grape varietal were investigated. Four composite soil samples were collected from 2 planting blocks planted to Pinot Noir and 2 planting blocks planted to Chardonnay grapes.  Wine samples were collected from the same locations from which the soils were collected from the 2014 vintage.  Soil samples were digested according USEPA Method 3050B and both soil and wine samples were analyzed via inductively coupled plasma-optical emission spectrophotometry (ICP-OES). Due to matrix interferences during ICP-OES analysis, the method of standard addition was used to extrapolate the actual concentrations of As and Se in both the soil and wine samples. Since As and Se are typically found in trace amounts in soils worldwide, we expect the concentrations of these elements to be below regulatory maximum contamination levels in both the soil and wine found in the California Central Coast vineyard. Investigations of As and Se concentrations in soils and food and drink products produced on soils are important for elucidating how these known human toxins may potentially accumulate in the food chain.

See more from this Division: Students of Agronomy, Soils and Environmental Sciences (SASES)
See more from this Session: Symposium--Undergraduate Research Symposium Contest - Oral II