PMID- 36920560
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20230316
LR  - 20230412
IS  - 1436-5073 (Electronic)
IS  - 0026-3672 (Print)
IS  - 0026-3672 (Linking)
VI  - 190
IP  - 4
DP  - 2023 Mar 15
TI  - POM@PMO plastic electrode for phosphate electrochemical detection: a further 
      improvement of the detection limit.
PG  - 135
LID - 10.1007/s00604-023-05679-1 [doi]
LID - 135
AB  - The development of a highly sensitive electrochemical sensor (E-sensor) is 
      described based on stand-alone plastic electrodes (PE) for phosphate detection, 
      being an essential nutrient in the marine environment. The detection mechanism is 
      based on the chemical affinity between polyoxomolybdate anions (POM) and 
      orthophosphate to form an electroactive phosphomolybdate complex. The custom-made 
      E-sensor was formulated with an organic octamolybdate derivative 
      (TBA(4)Mo(8)O(26)) incorporated with periodic mesoporous organosilica (PMO) to 
      obtain a significant improvement in the analytical performances of phosphate 
      determination. This POM@PMO combination was found to be advantageous in the 
      determination of low concentrations of phosphate in standard solutions ranging 
      from 1 to 500 nM, using square wave voltammetry as the detection technique. This 
      sensitivity enhancement can be attributed to the effect of hydrophobic PMO in 
      loading more POM moieties, owing to its highly porous structure and charged 
      shell. Consequently, the POM@PMO-PE sensor achieved a competitive sensitivity of 
      4.43 +/- 0.14 muA.nM(-1).cm(-2) and a limit of detection of 0.16 nM with good 
      selectivity against silicates. Finally, seawater and treated wastewater samples 
      have been tested to validate the sensor response in comparison to the official 
      method of phosphate determination.
CI  - (c) 2023. The Author(s).
FAU - Ben-Aissa, Sondes
AU  - Ben-Aissa S
AUID- ORCID: 0000-0002-4438-1760
AD  - Bioanalytical Chemistry-Aquaculture and Wildlife Management, Department of 
      Agri-food, Environment, and Animal Sciences (Di4A), University of Udine, Via 
      Sondrio 2/A, Udine, Italy.
AD  - Chemistry Department, Molecular Sciences Research Hub, Imperial College London, 
      London, UK.
FAU - De Marco, Rossella
AU  - De Marco R
AUID- ORCID: 0000-0001-7545-5921
AD  - Organic Chemistry-Chemistry Section, Department of Agri-food, Environment, and 
      Animal Sciences (Di4A), University of Udine, Via del Cotonificio, 108, Udine, 
      Italy.
FAU - Susmel, Sabina
AU  - Susmel S
AUID- ORCID: 0000-0002-6916-7373
AD  - Bioanalytical Chemistry-Aquaculture and Wildlife Management, Department of 
      Agri-food, Environment, and Animal Sciences (Di4A), University of Udine, Via 
      Sondrio 2/A, Udine, Italy. Sabina.Susmel@uniud.it.
LA  - eng
GR  - 10046144/EU Interreg project/
PT  - Journal Article
DEP - 20230315
PL  - Austria
TA  - Mikrochim Acta
JT  - Mikrochimica acta
JID - 7808782
SB  - IM
PMC - PMC10017643
OTO - NOTNLM
OT  - Octamolybdate
OT  - Periodic mesoporous organosilica
OT  - Phosphate
OT  - Plastic electrode
OT  - Seawater
OT  - Square-wave voltammetry
OT  - Wastewater
COIS- The authors declare no competing interests.
EDAT- 2023/03/16 06:00
MHDA- 2023/03/16 06:01
PMCR- 2023/03/15
CRDT- 2023/03/15 12:16
PHST- 2022/10/17 00:00 [received]
PHST- 2023/01/29 00:00 [accepted]
PHST- 2023/03/15 12:16 [entrez]
PHST- 2023/03/16 06:00 [pubmed]
PHST- 2023/03/16 06:01 [medline]
PHST- 2023/03/15 00:00 [pmc-release]
AID - 10.1007/s00604-023-05679-1 [pii]
AID - 5679 [pii]
AID - 10.1007/s00604-023-05679-1 [doi]
PST - epublish
SO  - Mikrochim Acta. 2023 Mar 15;190(4):135. doi: 10.1007/s00604-023-05679-1.