Validation of an analytical method with modified acid purity and iron matrices to measure heavy metals (Cd, Pb, Cr and As) in fertilizers
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| Authors: | , |
|---|---|
| Format: | artículo original |
| Status: | Versión publicada |
| Publication Date: | 2022 |
| Description: | Introduction: The frequent use of fertilizers in the Costa Rican agricultural sector causes environmental pollution; and heavy metals are among the main pollutants because of their high toxicity, strengthening the need for affordable and reliable local methods to assess pollution levels. Objective: To validate an adaptation of a method that uses modified acid purity and iron matrices to measure heavy metals (Cd, Pb, Cr and As) in fertilizers. Method: We tested four duplicate analyzes of a sample of known concentration with reactive grade acids and ultra-pure acids. For the iron interference test, we used eight replicates. We also did tests for bias, precision, detection limits, quantification limit, specificity, recovery, false positives and false negatives. Results: The new method proved satisfactory and its efficiency held by analytical performance parameters. Conclusions: The method is resistant to changes in acid purity, and tolerates matrices with iron concentrations under 5% m/m. |
| Country: | Portal de Revistas UNED |
| Institution: | Universidad Estatal a Distancia |
| Repositorio: | Portal de Revistas UNED |
| Language: | Español |
| OAI Identifier: | oai:revistas.investiga.uned.ac.cr:article/3485 |
| Online Access: | https://revistas.uned.ac.cr/index.php/cuadernos/article/view/3485 |
| Keyword: | heavy metals fertilizer agrochemicals validation ICP metales pesados fertilizante agroquímicos validación |