Evaluation of Nitrate and Potassium Ion-Selective Membranes for Soil Macronutrient Sensing

dc.contributor.author Kim, Hak-Jin
dc.contributor.author Hummel, John
dc.contributor.author Birrell, Stuart
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-14T15:25:59.000
dc.date.accessioned 2020-06-29T22:40:48Z
dc.date.available 2020-06-29T22:40:48Z
dc.date.embargo 2014-09-17
dc.date.issued 2006-01-01
dc.description.abstract <p>On-the-go, real-time soil nutrient analysis would be useful in site-specific management of soil fertility. The rapid response and low sample volume associated with ion-selective field-effect transistors (ISFETs) make them good soil fertility sensor candidates. Ion-selective microelectrode technology requires an ion-selective membrane that responds selectively to one analyte in the presence of other ions in a solution. This article describes: (1) the evaluation of nitrate and potassium ion-selective membranes, and (2) the investigation of the interaction between the ion-selective membranes and soil extractants to identify membranes and extracting solutions that are compatible for use with a real-time ISFET sensor to measure nitrate and potassium ions in soil. The responses of the nitrate membranes with tetradodecylammonium nitrate (TDDA) or methlytridodecylammonium chloride (MTDA) and potassium membranes with valinomycin were affected by both membrane type and soil extractant. A TDDA-based nitrate membrane would be capable of detecting low concentrations in soils to about 10-5 mole/L NO3 -. The valinomycin-based potassium membranes showed satisfactory selectivity performance in measuring potassium in the presence of interfering cations such as Na+, Mg2+, Ca2+, Al3+, and Li+ as well as provided a consistent sensitivity when DI water, Kelowna, or Bray P1 solutions were used as base solutions. The TDDA-based nitrate membrane and the valinomycin-based potassium membrane, used in conjunction with Kelowna extractant, would allow determination of nitrate and potassium levels, respectively, for site-specific control of fertilizer application.</p>
dc.description.comments <p>This article is from <em>Transactions of the ASABE</em> 49 (2006): 597–606, doi:<a href="http://dx.doi.org/10.13031/2013.20476" target="_blank">10.13031/2013.20476</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/556/
dc.identifier.articleid 1835
dc.identifier.contextkey 6127224
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/556
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1335
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/556/2006_Kim_EvaluationNitrate.pdf|||Sat Jan 15 00:56:04 UTC 2022
dc.source.uri 10.13031/2013.20476
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Soil Science
dc.subject.keywords Ion-selective electrode (ISE)
dc.subject.keywords Ion-selective field-effect transistor (ISFET)
dc.subject.keywords Ion-selective membranes
dc.subject.keywords Kelowna extractant
dc.subject.keywords Nitrate
dc.subject.keywords Potassium
dc.subject.keywords Selectivity
dc.subject.keywords Sensitivity
dc.subject.keywords Soil extractant
dc.subject.keywords Soil testing
dc.title Evaluation of Nitrate and Potassium Ion-Selective Membranes for Soil Macronutrient Sensing
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 1fd6ff71-dbea-4ada-9267-f9ff2ce1caba
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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