| Autor: |
Aini, Hanifah Nur, Rumhayati, Barlah, Fardiyah, Qonitah, Wiryawan, Adam, Andayani, Ulfa, Azzah, Anisah Nabilah |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2903 Issue 1, p1-6, 6p |
| Abstrakt: |
The effect of pH and nitrate ion as a matrix on phosphate measurement using PIMs has been studied. PIMs are a form of passive sampler used as a diffusion layer. PIMs were prepared with cellulose triacetate (CTA) as the base polymer, 2-Nitro phenyl octyl ether (2-NPOE) as a plasticizer, and Aliquot 336-Cl as a carrier. The performance of the PIMs passive sampler was studied by filling the bulk phase with 0.6 mg/L phosphate solution with and without 1.0 mg/L nitrate ion as a matrix. The internal phase was filled with 15 mL of 0.1 M NaCl in a passive sampler and then allowed to stand for 48 hours. Determination of pH in the bulk phase was carried out before and after sampling to determine the phosphate species. The bulk phase phosphate concentration was measured at a wavelength of 691 nm and the internal phase at a wavelength of 710 nm using an Ultraviolet-Visible (UV-Vis) spectrophotometer. The percentages of phosphate and nitrate ions uptake were calculated by dividing between the concentrations in the internal phase and the bulk phase. The results showed that the pH before and after sampling was around 6.0 – 6.5 so the species of phosphate was H2PO4−. pH in the bulk phase after sampling is higher than before sampling. The results showed pH in the bulk phase after sampling is higher than before sampling. The percentage of phosphate ions obtained in the internal phase without the addition of nitrate ions was 89.6% (v/v). The addition of 1.0 mg/L nitrate ion as a matrix can reduce the percentage of phosphate ions by 70.1% (v/v) with the percentage of nitrate ions absorbed in the internal phase of 3% (v/v). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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