Analytical Methods for Mineral Determination

The protocols followed in this study were developed by Malavolta et al.¹⁸ Different techniques were used for different minerals:

Atomic absorption spectrophotometry for Sodium (Na), Zinc (Zn), Manganese (Mn), Iron (Fe), Calcium (Ca), Magnesium (Mg), and Potassium (K).

Colorimetry of aluminum: Aluminum (Al)

Silver nitrate titrimetry: Chlorine (Cl)

Metavanadate colorimetry: Phosphorus (P)

Barium sulfate turbidimetry: Sulfur (S)

Semi-micro-Kjeldahl: Nitrogen (N)

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Perez S.L., Ferro R.B., Corrêa B., Casarin R., Corrêa T.Q., Blanco K.C, & Bagnato V.S. (2024). Enhanced vegetable production in hydroponic systems using decontamination of closed circulating fluid. Scientific Reports, 14, 602.

Publication 2024

Corresponding Organization : Universidade de São Paulo

Other organizations : Texas A&M University

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Variable analysis

independent variables

Techniques used for different minerals: Atomic absorption spectrophotometry, Colorimetry, Silver nitrate titrimetry, Metavanadate colorimetry, Barium sulfate turbidimetry, Semi-micro-Kjeldahl

dependent variables

Sodium (Na), Zinc (Zn), Manganese (Mn), Iron (Fe), Calcium (Ca), Magnesium (Mg), Potassium (K), Aluminum (Al), Chlorine (Cl), Phosphorus (P), Sulfur (S), Nitrogen (N)

control variables

No control variables are explicitly mentioned.

controls

No positive or negative controls are specified by the authors.

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