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. 2022 May 12;414(16):4745–4756. doi: 10.1007/s00216-022-04098-0

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© Crown 2022, corrected publication 2022

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Fig. 3 — Nutrient stability in SALT-1 4.0% w/w solution: effect of pH and time. Three SALT-1 solutions were prepared in water. One was analyzed as-is (pH 8.9) and the other two were pH adjusted with 0.1 M HCl (pH 8.0 and 7.2). All samples were kept at room temperature. Top: phosphate results (photometry); middle: silicate results (photometry); bottom: nitrate results (isotope dilution GC−MS). The raw data are reported in Table S1