Simultaneous determination of the size and concentration of AgNPs in water samples by UV–vis spectrophotometry and chemometrics tools

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dc.contributor.authorMoreno Martín, Gustavo
dc.contributor.authorLeón González, María Eugenia De
dc.contributor.authorMadrid Albarrán, María Yolanda
dc.date.accessioned2024-01-15T17:19:39Z
dc.date.available2024-01-15T17:19:39Z
dc.date.issued2018
dc.description.abstractThe combination of UV–vis spectrophotometry with a chemometric calibration tool based on partial least squares (PLS) has allowed us the development of a multivariate analytical method that simultaneously estimates the concentration and size of mixtures of silver nanoparticles (AgNPs) in environmental water samples. The method is based on changes in the surface plasmon resonance band (SPRB) of AgNPs when they form aggregated/assembled structures with L-cysteine (L-cys). Measurementts were performed by employed a fixed-time kinetics method that implies that the final spectra (response) are obtained by subtstracting the solutions spectra at fixed times. Optimization of experimental conditions affecting aggregation such as time, temperature, pH and concentration of aggregating substance was performed by experimental design and response surface methodologies (RSM). A multivariate calibration model using AgNPs of known diameter size ((20 ± 3), (41 ± 3), (59 ± 5) and (79 ± 7) nm) within a concentration range between 0.62 and 2.5 mg L−1 was constructed by using a mixture experimental design and PLS. The method was finally applied to estimate size and concentration of AgNPs in AgNPs-spiked river and tap water samples. Water samples were spiked with individual, binary and ternary mixtures of AgNPs of different sizes and by using two types of AgNPs: citrate-coated AgNPs (cit-AgNPs) and polyvinylpyrrolidone-coated AgNPs (PVP-AgNPs). A good correspondence was obtained between predicted values and the total amount of AgNPs added with recovery values ranged within 80–160% for the individual mixtures, 68–108% for the binary mixtures and 60–64% for the ternary mixtures of AgNPs. Finally, transmission electron microscopy (TEM) measurements were performed for those cases where discrepancies between the expected and the obtained values were observed. TEM micrographs evidenced the presence of agglomerates or aggregates of AgNPs in some of the mixtures or water tested.
dc.description.departmentDepto. de Química Analítica
dc.description.facultyFac. de Ciencias Químicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Ciencia, Innovación y Universidades (España)
dc.description.sponsorshipComunidad de Madrid
dc.description.sponsorshipEuropean Commission
dc.description.statuspub
dc.identifier.citationMoreno-Martin G, León-González ME, Madrid Y, Simultaneous determination of the size and concentration of AgNPs in water samples by UV-vis spectrophotometry and chemometrics tools 2018, 188,: 393-403
dc.identifier.doi10.1016/j.talanta.2018.06.009
dc.identifier.issn0039-9140
dc.identifier.officialurlhttps://doi.org/10.1016/j.talanta.2018.06.009
dc.identifier.urihttps://hdl.handle.net/20.500.14352/93195
dc.journal.titleTalanta
dc.language.isoeng
dc.page.final403
dc.page.initial393
dc.publisherElsevier
dc.relation.projectIDCTQ2014-54801-C2-1-R
dc.relation.projectIDS2013/ABI-3028,AVANSECAL-CM
dc.rights.accessRightsrestricted access
dc.subject.cdu543
dc.subject.keywordAgNPs
dc.subject.keywordUV–vis spectrophotometry
dc.subject.keywordWater
dc.subject.keywordExperimental design
dc.subject.keywordMultivariate calibration
dc.subject.keywordPLS
dc.subject.ucmQuímica
dc.subject.unesco2301 Química Analítica
dc.titleSimultaneous determination of the size and concentration of AgNPs in water samples by UV–vis spectrophotometry and chemometrics tools
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number188
dspace.entity.typePublication
relation.isAuthorOfPublicatione2c3f916-865d-4419-b68b-9e52cb1c6cca
relation.isAuthorOfPublication90a102b1-a583-41ce-a218-5ece43e45469
relation.isAuthorOfPublication190287de-ed47-4954-86ff-d4f1eddff035
relation.isAuthorOfPublication.latestForDiscoverye2c3f916-865d-4419-b68b-9e52cb1c6cca
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