In-house manufactured benchtop XRF spectrometer

Autor(es)

Gozetto, Jonatha Demetrio ; de Almeida, Eduardo ; Brasil, Marcos Augusto Stolf ; Virgilio, Alex ; Santos, Eduardo ; Furlan, Gil Ribeiro ; de Carvalho, Hudson Wallace Pereira

• Tipo de documento: Artigo Científico
• Fonte: X-RAY SPECTROMETRY; v. N/A, p. 10-pg., 2023-06-14.

Resumo

The growing efficiency of agribusiness depends on the development of technology. A key challenge regards the determination of plant mineral content, which help farmers to make a decision about fertilizer use. Currently, such nutritional status diagnoses are made based on wet chemical methods; they are usually slow and generate chemical wastess. In this context, an in-house manufactured XRF benchtop for agri-samples is proposed in this study. This XRF system was furnished with a manual primary filter changer, vacuum chamber, dual interlock radiological protection system, which were installed in the equipment cover, and light signals. Analytical capabilities were also evaluated. The equipment presented spurious peaks of Ti, Fe, Ni, and Zn, which is not ideal for some agronomical applications; this issue might be overcome in the future by means of additional primary filters. The total x-ray spectrum counting rate is roughly one magnitude order lower than two other commercial XRF systems, but the signal-to-noise ratio is quite similar. The vacuum chamber under partial vacuum improves the Al, Si, P and S signals from 1.5 to 2.2. The limits of detection (LOD, mg kg(-1)) for P (261), S (168), K (68), and Ca (50) macronutrients and Mn (14), Fe (15), Cu (9), and Zn (8) micronutrients are close to the ones reported in the literature. The limits of detection for P, S, K, and Ca are suitable for plant analysis. (AU)

• Processo FAPESP: 21/01912-0 - Avaliação de procedimentos analíticos para determinação de teores totais e frações bioacessíveis de nutrientes e elementos tóxicos em farinhas funcionais
• Beneficiário: Alex Virgilio
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/11546-8 - Eficiência da aplicação foliar de diferentes fontes de cálcio em tomate: entendendo e contornando a baixa mobilidade no floema
• Beneficiário: Eduardo Santos
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 20/11178-9 - CaMov - caracterização da absorção foliar, translocação e exportação de cálcio para os frutos: uma busca por fontes de cálcio com mobilidade aumentada
• Beneficiário: Hudson Wallace Pereira de Carvalho
• Modalidade de apoio: Auxílio à Pesquisa - Regular