Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops.
ABSTRACT.- The practical value of portable hand-held ion selective electrode sensors (ISE) for on-farm [NO3-] measurement to assist with crop N management of vegetable crops has been demonstrated in numerous previous studies. They provide rapid, in-situ measurement of the nitrate concentration ([NO3...
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2022
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| _version_ | 1868890144959889408 |
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| author | PEÑA-FLEITAS, M.T. |
| author2 | GRASSO, R. GALLARDO, M. PADILLA, F.M. DE SOUZA, R. RODRÍGUEZ , A. THOMPSON, R.B. |
| author2_role | author author author author author author |
| author_browse | DE SOUZA, R. GALLARDO, M. GRASSO, R. PADILLA, F.M. PEÑA-FLEITAS, M.T. RODRÍGUEZ , A. THOMPSON, R.B. |
| author_facet | PEÑA-FLEITAS, M.T. GRASSO, R. GALLARDO, M. PADILLA, F.M. DE SOUZA, R. RODRÍGUEZ , A. THOMPSON, R.B. |
| author_role | author |
| collection | AINFO |
| dc.creator.none.fl_str_mv | PEÑA-FLEITAS, M.T. GRASSO, R. GALLARDO, M. PADILLA, F.M. DE SOUZA, R. RODRÍGUEZ , A. THOMPSON, R.B. |
| dc.date.none.fl_str_mv | 2022 2025-06-23T18:25:46Z 2025-06-23T18:25:46Z 2025-06-23T18:25:46Z |
| dc.identifier.none.fl_str_mv | https://ainfo.inia.uy/consulta/busca?b=pc&id=63825&biblioteca=vazio&busca=63825&qFacets=63825 |
| dc.language.none.fl_str_mv | en eng |
| dc.rights.none.fl_str_mv | info:eu-repo/semantics/openAccess Acceso abierto |
| dc.source.none.fl_str_mv | reponame:AINFO instname:Instituto Nacional de Investigación Agropecuaria instacron:Instituto Nacional de Investigación Agropecuaria |
| dc.subject.none.fl_str_mv | Quick tests ISE LAQUAtwin Horiba N monitoring Nutrient solution Soil solution Petiole sap Fertigation |
| dc.title.none.fl_str_mv | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops. |
| dc.type.none.fl_str_mv | Article PublishedVersion info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| description | ABSTRACT.- The practical value of portable hand-held ion selective electrode sensors (ISE) for on-farm [NO3-] measurement to assist with crop N management of vegetable crops has been demonstrated in numerous previous studies. They provide rapid, in-situ measurement of the nitrate concentration ([NO3-]) in nutrient and soil solutions, and in petiole sap. Sample temperatures, for on-farm measurements, vary appreciably. This study evaluated the effects of sample temperature on [NO3-] measurement using two different models of a commonly used, commercially available, portable ISE meter. The temperatures (5, 10, 15, 20, and 25 °C) examined were in the range likely to be encountered in practical on-farm work. Aqueous solutions of 6, 12, and 18 mmol NO3-L-1 were prepared from KNO3, Ca(NO3)2 and NaNO3. [NO3-] was measured in three replicate samples of each of the three concentrations, made from each NO3-; compound, at each temperature. The results consistently and clearly demonstrated a strong negative linear relationship between temperature-induced errors and sample temperatures. The temperature-induced error was considerable for cooled samples, being +50% at 5 °C and +31% at 10 °C. At sample temperatures of 17-20 °C, the temperature effects were minimal. Above this range, the temperature effect caused underestimation. At 25 °C, the temperature-induced error was -24%. These results show that care must be taken to ensure that sample temperatures do not erroneously affect the measurement of [NO3-] with ISE meters. Particular care needs to be taken with both refrigerated and warmer samples. © 2022 by the authors. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | anni_9b96702eeb49240c20297158f8564aea |
| instacron_str | Instituto Nacional de Investigación Agropecuaria |
| institution | Instituto Nacional de Investigación Agropecuaria |
| instname_str | Instituto Nacional de Investigación Agropecuaria |
| language | eng |
| language_invalid_str_mv | en |
| network_acronym_str | anni |
| network_name_str | oai-lr-anni |
| oai_identifier_str | oai:redi.anii.org.uy:20.500.12381/4264 |
| publishDate | 2022 |
| publishDateSort | 2022 |
| reponame_str | AINFO |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | Acceso abierto |
| spelling | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops.PEÑA-FLEITAS, M.T.GRASSO, R.GALLARDO, M.PADILLA, F.M.DE SOUZA, R.RODRÍGUEZ , A.THOMPSON, R.B.Quick testsISELAQUAtwinHoribaN monitoringNutrient solutionSoil solutionPetiole sapFertigationABSTRACT.- The practical value of portable hand-held ion selective electrode sensors (ISE) for on-farm [NO3-] measurement to assist with crop N management of vegetable crops has been demonstrated in numerous previous studies. They provide rapid, in-situ measurement of the nitrate concentration ([NO3-]) in nutrient and soil solutions, and in petiole sap. Sample temperatures, for on-farm measurements, vary appreciably. This study evaluated the effects of sample temperature on [NO3-] measurement using two different models of a commonly used, commercially available, portable ISE meter. The temperatures (5, 10, 15, 20, and 25 °C) examined were in the range likely to be encountered in practical on-farm work. Aqueous solutions of 6, 12, and 18 mmol NO3-L-1 were prepared from KNO3, Ca(NO3)2 and NaNO3. [NO3-] was measured in three replicate samples of each of the three concentrations, made from each NO3-; compound, at each temperature. The results consistently and clearly demonstrated a strong negative linear relationship between temperature-induced errors and sample temperatures. The temperature-induced error was considerable for cooled samples, being +50% at 5 °C and +31% at 10 °C. At sample temperatures of 17-20 °C, the temperature effects were minimal. Above this range, the temperature effect caused underestimation. At 25 °C, the temperature-induced error was -24%. These results show that care must be taken to ensure that sample temperatures do not erroneously affect the measurement of [NO3-] with ISE meters. Particular care needs to be taken with both refrigerated and warmer samples. © 2022 by the authors.2025-06-23T18:25:46Z2025-06-23T18:25:46Z20222025-06-23T18:25:46ZArticlePublishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://ainfo.inia.uy/consulta/busca?b=pc&id=63825&biblioteca=vazio&busca=63825&qFacets=63825reponame:AINFOinstname:Instituto Nacional de Investigación Agropecuariainstacron:Instituto Nacional de Investigación Agropecuariaenenginfo:eu-repo/semantics/openAccessAcceso abiertooai:redi.anii.org.uy:20.500.12381/42642026-02-10T17:36:17Z |
| spellingShingle | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops. PEÑA-FLEITAS, M.T. Quick tests ISE LAQUAtwin Horiba N monitoring Nutrient solution Soil solution Petiole sap Fertigation |
| status_str | publishedVersion |
| title | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops. |
| title_full | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops. |
| title_fullStr | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops. |
| title_full_unstemmed | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops. |
| title_short | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops. |
| title_sort | Sample temperature affects measurement of nitrate with a rapid analysis ion selective electrode system used for N management of vegetable crops. |
| topic | Quick tests ISE LAQUAtwin Horiba N monitoring Nutrient solution Soil solution Petiole sap Fertigation |
| url | https://ainfo.inia.uy/consulta/busca?b=pc&id=63825&biblioteca=vazio&busca=63825&qFacets=63825 |