TY - JOUR
T1 - Effect of pH and anion interferences on determination of orthophosphate speciation by diffusive gradient in thin film (DGT) technique
AU - Maimulyanti, Askal
AU - Budiawan,
AU - Saefumillah, Asep
AU - Suseno, Heny
N1 - Publisher Copyright:
© 2018 Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma. All right reserved.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - The diffusive gradient in thin film (DGT) is an analytical method on separation and determination of phosphate. The surface analysis of gel was used in the scanning electron microscopy (SEM) that show the chemical and physical interaction in diffuse gel and oxide gel. The response of DGT device in speciation of phosphorus as H2PO- 4, HPO2- 4 and PO3- 4 showed a linear correlation between concentration and accumulation of phosphate with the concentration of 0.2 – 1.0 mgL-1. Species of H2PO- 4 give a linear correlation of 0.9792 with regression linear at y = 9.8825x - 0.0503. The HPO2- 4 give a linear correlation of 0.8872 with regression linear at y = 7.2143x - 0.7545. The species of PO3- 4 give a linear correlation of 0.9769 with regression linear at y = 7.5558x - 0.1828. The phosphorus accumulation from different speciation showed H2PO- 4 ˃ PO3- 4> HPO4 2 with accumulation was 9.6525 μg, 7.1589 μg, and 6.8783 μg, respectively. The DGT can response of phosphate with various pH at 2-12 and showed the species of phosphate as H2PO- 4, HPO2- 4 and PO3- 4. The optimum response show at the pH of 4 that shows the species of H2PO- 4. Anion interference was studied in this research including SO2- 4, NO- 3 and CO2- 3. Effect of anion sulfate, nitrate and carbonate can reduce of phosphate accumulation in DGT device in the range of anion concentration from 0.05 to 0.25 mgL-1. The interferences of NO- 4, SO2- 4, CO2- 3 at 0.25 mgL-1 can reduce of phosphate accumulation with the efficiency of 64.64 %, 25.10 %, and 7.57 %, respectively. The effect of NO- 3 ˃ SO2- 4 ˃ CO2- 3 in the accumulation of phosphate in the binding gel of DGT unit. Keywords: orthophosphate, DGT, speciation, pH, anion interferences.
AB - The diffusive gradient in thin film (DGT) is an analytical method on separation and determination of phosphate. The surface analysis of gel was used in the scanning electron microscopy (SEM) that show the chemical and physical interaction in diffuse gel and oxide gel. The response of DGT device in speciation of phosphorus as H2PO- 4, HPO2- 4 and PO3- 4 showed a linear correlation between concentration and accumulation of phosphate with the concentration of 0.2 – 1.0 mgL-1. Species of H2PO- 4 give a linear correlation of 0.9792 with regression linear at y = 9.8825x - 0.0503. The HPO2- 4 give a linear correlation of 0.8872 with regression linear at y = 7.2143x - 0.7545. The species of PO3- 4 give a linear correlation of 0.9769 with regression linear at y = 7.5558x - 0.1828. The phosphorus accumulation from different speciation showed H2PO- 4 ˃ PO3- 4> HPO4 2 with accumulation was 9.6525 μg, 7.1589 μg, and 6.8783 μg, respectively. The DGT can response of phosphate with various pH at 2-12 and showed the species of phosphate as H2PO- 4, HPO2- 4 and PO3- 4. The optimum response show at the pH of 4 that shows the species of H2PO- 4. Anion interference was studied in this research including SO2- 4, NO- 3 and CO2- 3. Effect of anion sulfate, nitrate and carbonate can reduce of phosphate accumulation in DGT device in the range of anion concentration from 0.05 to 0.25 mgL-1. The interferences of NO- 4, SO2- 4, CO2- 3 at 0.25 mgL-1 can reduce of phosphate accumulation with the efficiency of 64.64 %, 25.10 %, and 7.57 %, respectively. The effect of NO- 3 ˃ SO2- 4 ˃ CO2- 3 in the accumulation of phosphate in the binding gel of DGT unit. Keywords: orthophosphate, DGT, speciation, pH, anion interferences.
KW - Anion interferences
KW - DGT
KW - Orthophosphate
KW - Speciation
KW - pH
UR - http://www.scopus.com/inward/record.url?scp=85054667541&partnerID=8YFLogxK
U2 - 10.31788/RJC.2018.1133057
DO - 10.31788/RJC.2018.1133057
M3 - Article
AN - SCOPUS:85054667541
SN - 0974-1496
VL - 11
SP - 1222
EP - 1228
JO - Rasayan Journal of Chemistry
JF - Rasayan Journal of Chemistry
IS - 3
ER -