Sample Temperature Affects Measurement of Nitrate with a Rapid Analysis Ion Selective Electrode System Used for N Management of Vegetable Crops
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 nutr...
| Κύριοι συγγραφείς: | , , , , , , |
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| Μορφή: | info:eu-repo/semantics/article |
| Γλώσσα: | English |
| Έκδοση: |
MDPI
2022
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| Θέματα: | |
| Διαθέσιμο Online: | http://hdl.handle.net/10835/14132 |
| _version_ | 1789406379585306624 |
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| author | Peña Fleitas, María Teresa Grasso, Rafael Gallardo Pino, Luisa Padilla Ruiz, Francisco Manuel DeSouza, Romina Rodríguez, Alejandra Thompson, Rodney |
| author_facet | Peña Fleitas, María Teresa Grasso, Rafael Gallardo Pino, Luisa Padilla Ruiz, Francisco Manuel DeSouza, Romina Rodríguez, Alejandra Thompson, Rodney |
| author_sort | Peña Fleitas, María Teresa |
| collection | DSpace |
| description | 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. |
| format | info:eu-repo/semantics/article |
| id | oai:repositorio.ual.es:10835-14132 |
| institution | Universidad de Cuenca |
| language | English |
| publishDate | 2022 |
| publisher | MDPI |
| record_format | dspace |
| spelling | oai:repositorio.ual.es:10835-141322023-04-12T18:53:37Z Sample Temperature Affects Measurement of Nitrate with a Rapid Analysis Ion Selective Electrode System Used for N Management of Vegetable Crops Peña Fleitas, María Teresa Grasso, Rafael Gallardo Pino, Luisa Padilla Ruiz, Francisco Manuel DeSouza, Romina Rodríguez, Alejandra Thompson, Rodney quick tests ISE LAQUAtwin Horiba N monitoring nutrient solution soil solution petiole sap fertigation 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. 2022-12-20T14:22:14Z 2022-12-20T14:22:14Z 2022-11-30 info:eu-repo/semantics/article 2073-4395 http://hdl.handle.net/10835/14132 10.3390/agronomy12123031 en https://www.mdpi.com/2073-4395/12/12/3031 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess MDPI |
| spellingShingle | quick tests ISE LAQUAtwin Horiba N monitoring nutrient solution soil solution petiole sap fertigation Peña Fleitas, María Teresa Grasso, Rafael Gallardo Pino, Luisa Padilla Ruiz, Francisco Manuel DeSouza, Romina Rodríguez, Alejandra Thompson, Rodney Sample Temperature Affects Measurement of Nitrate with a Rapid Analysis Ion Selective Electrode System Used for N Management of Vegetable Crops |
| 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 | http://hdl.handle.net/10835/14132 |
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