Managing Global Resources for a Secure Future

2017 Annual Meeting | Oct. 22-25 | Tampa, FL

339-10 Quantification of Carboxylic Acids and Phenols in High Organic Content Liquids with an Automated Potentiometric Titration Method.

See more from this Division: SSSA Division: Soils and Environmental Quality
See more from this Session: Soils and Environmental Quality General Oral II

Wednesday, October 25, 2017: 10:35 AM
Tampa Convention Center, Room 39

Karen He, Actagro LLC, Fresno, CA, Taha Rezai, California, Actagro LLC, Fresno, CA and John L. Breen, Research & Development, Actagro LLC, Fresno, CA
Abstract:
Currently there are many different types of high organic content liquids (HOCL) available in the market for agricultural use. These products often include components like seaweed extracts, compost tea and/or humic substances as well as other additives which result in a complex mixture that is difficult to characterize. The typical label analysis for these types of products include Humic Acid, Total Carbon or Organic Matter, which are bulk material properties that don’t necessarily correlate with agricultural benefits. In this work, an alternative quantitative method that determines Carboxylic Acids and Phenols is proposed as one step in a two part analysis of HOCL. This method uses an automated potentiometric titration to determine acidic functional groups in HOCL. Results show that the proposed quantitative method can accurately and precisely determine the concentration of known spiked standards in a complex liquid organic matrix. We think this method may be an improvement on existing methods to quantify liquid agricultural supplements.

See more from this Division: SSSA Division: Soils and Environmental Quality
See more from this Session: Soils and Environmental Quality General Oral II