Inorganic salts in atmospheric particulate matter: Raman spectroscopy as an analytical tool

Jentzsch, Paul Vargas; Kampe, Bernd; Ciobotă, Valerian; Rösch, Petra; Popp, Jürgen

doi:10.1016/j.saa.2013.06.085

Cited by 55 publications

(42 citation statements)

References 106 publications

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“…In addition to volcanic environments, this compound can be also found as degradation form on building materials and artworks . Considering that K 3 Na(SO 4 ) 2 is not industrially commercialized, further problems can also arise from the quality and the purity of the compound obtained through the process of synthesis . The mentioned issues can be considered as the main factors leading to the spectral differences observed in the few spectra collected in the bibliography (see Table ).…”

Section: Introductionmentioning

confidence: 99%

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

Prieto‐Taboada

Vallejuelo

Veneranda

et al. 2018

J Raman Spectroscopy

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The Raman spectra of the Na 2 SO 4 -K 2 SO 4 -H 2 O system are not well-defined in the literature. Specifically, the proper identification of sodium and potassium sulphate (aphthitalite or glaserite, K 3 Na(SO 4 ) 2 ) and anhydrous sodium sulphate (thenardite, Na 2 SO 4 ) is particularly problematic because their vibrational profiles present the same main Raman peak at 993 cm −1 and very similar low frequency bands. As proved in bibliography, the similarity of their spectra can often lead to uncertain or erroneous identifications. Considering that aphthitalite and thenardite can be found as degradation products on built heritage materials and the degree of danger associated to them is not the same, being the second one the most harmful, the resolution of this problem has a critical importance. For this reason, in the present work, the Raman spectra of aphthitalite and thenardite are deeply studied to identify the vibrational fingerprints enabling their correct identification. The results here summarized and provided by two different Raman instruments highlight that the spectrum of aphthitalite displays characteristic bands at 1,084 and 1,202 cm −1 . In contrast, the bands at 1,100, 1,129, and 1,152 cm −1 seem to be characteristic of thenardite. Furthermore, when those secondary bands are not observed or mixtures of both compounds are present, the ratio between their most intense bands at 452 and 993 cm −1 is the key for their correct characterization. On the whole, this study fills the gaps observed in literature and gives the solution for the correct identification of aphthitalite and thenardite even when secondary bands are not observed.

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Section: Introductionmentioning

confidence: 99%

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

Prieto‐Taboada

Vallejuelo

Veneranda

et al. 2018

J Raman Spectroscopy

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“…It has several applications in chemistry, physics and biology, highlighting studies on the composition of materials in different areas, such as microbiology, arts, archaeology, geology and atmospheric sciences, among many others [17][18][19][20][21][22][23][24]. Since handheld Raman spectrometers with short acquisition times and reasonable spectral resolutions are available, the applicability of this technique in industry has remarkably increased.…”

Section: Introductionmentioning

confidence: 99%

Handheld Raman Spectroscopy for the Distinction of Essential Oils Used in the Cosmetics Industry

Jentzsch

Ramos²,

Ciobotă³

2015

Cosmetics

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Essential oils are highly appreciated by the cosmetics industry because they have antimicrobial and antioxidant properties, among others. Since essential oils are natural products, their inclusion in cosmetic formulations is a common practice. Currently, low-quality and/or adulterated essential oils can be found on the market; therefore, analytical methods for control are required. Raman spectroscopy is a versatile technique that can be used for quality control tasks; the portability of modern devices expand the analytical possibilities also to in situ measurements. Fifteen essential oils of interest for the cosmetics industry were measured using a handheld Raman spectrometer, and the assignment of the main bands observed in their average spectra was proposed. In most cases, it is possible to distinguish the essential oils by a simple visual inspection of their characteristic Raman bands. However, for essential oils extracted from closely-related vegetable species and containing the same main component in a very high proportion, the visual inspection of the spectra may be not enough, and the application of chemometric methods is suggested. Characteristic Raman bands for each essential oil can be used to both identify the essential oils and detect adulterations. OPEN ACCESSCosmetics 2015, 2 163

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“…It is expected to be identified by the peak of (N-H) at 3000-3200 cm À1 (Venkateswarlu, Bist, and Jain 1975;Dong et al 2007), however, no noticeable peaks were observed in our spectra. The (N-H) mode is a broad peak which results from hydrogen bonding and reported to be weaker than (SO 4 2-) mode (Degen and Newman, 1993;Jentzsch et al 2013;Tirella et al 2018). It is likely that the signal intensity was not strong enough to be detected as a peak in this method, and this may also explain why SERS based detection of (N-H) is found only in a limited number of studies.…”

Section: Detection Of Sers Signal From Laboratorygenerated Nanoparticlesmentioning

confidence: 96%

Application of SERS on the chemical speciation of individual Aitken mode particles after condensational growth

Kunihisa

Iwata

Gen

et al. 2020

Aerosol Science and Technology

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The chemical speciation of nanoparticles is technically challenging because of the minute mass of the particles. There is a constant need for more sensitive collection methods and chemical analyses. In this study, we demonstrated the applicability of a surface enhanced Raman scattering (SERS) technique on the rapid and sensitive chemical analysis of individual nanoparticles. SERS technique provides a significant enhancement of the scattering efficiency over traditional Raman spectroscopy. The novelty of the proposed technique is that the SERS substrate is used directly as the sampling substrate of a condensational growth tube (CGT) sampler, which can activate nanoparticles into water droplets and ensure simultaneous inertial sampling and SERS pretreatment. First, we investigated applicability of the method on mono-dispersed (20 nm, 50 nm, or 100 nm) ammonium sulfate (AS) and levoglucosan (LG) particles as model aerosols. The method was then applied to ambient nanoparticles. The successful detection of peaks corresponding to sulfate (SO 4 2-) and organics (C-H) indicates that our proposed method to combine a CGT sampler and SERS showed a sensitivity high enough to provide deep insights into the chemical speciation of atmospheric nanoparticles as small as 20 nm in diameter.

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Inorganic salts in atmospheric particulate matter: Raman spectroscopy as an analytical tool

Cited by 55 publications

References 106 publications

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

Handheld Raman Spectroscopy for the Distinction of Essential Oils Used in the Cosmetics Industry

Application of SERS on the chemical speciation of individual Aitken mode particles after condensational growth

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Inorganic salts in atmospheric particulate matter: Raman spectroscopy as an analytical tool

Cited by 55 publications

References 106 publications

The Raman spectra of the Na2SO4‐K2SO4 system: Applicability to soluble salts studies in built heritage

The Raman spectra of the Na2SO4‐K2SO4 system: Applicability to soluble salts studies in built heritage

Handheld Raman Spectroscopy for the Distinction of Essential Oils Used in the Cosmetics Industry

Application of SERS on the chemical speciation of individual Aitken mode particles after condensational growth

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Product

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The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage

The Raman spectra of the Na₂SO₄‐K₂SO₄ system: Applicability to soluble salts studies in built heritage