Determination of ammonium and organic bound nitrogen by inductively coupled plasma emission spectroscopy

Jaber, A. M. Y.; Mehanna, N.A.; Sultan, Salah M.

doi:10.1016/j.talanta.2009.01.060

Cited by 17 publications

(18 citation statements)

References 16 publications

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“…The Ce/Au weight ratio of the CeO 2 -wrapped Au NPs was determined to be about 1.5 via inductively coupled plasma emission spectroscopy technology. [35] This value is much smaller than that (2.6) calculated for a dense-CeO 2 -wrapped-Au NP with the same size parameters. This result indicates the presence of pores in the CeO 2 shells.…”

Section: Microporous-ceo 2 Wrapped Gold Npsmentioning

confidence: 68%

Microporous‐Ceria‐Wrapped Gold Nanoparticles for Conductometric and SERS Dual Monitoring of Hazardous Gases at Room Temperature

Bao

Guo

Zhang

et al. 2022

Adv Materials Inter

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metal NPs have relatively high surface energy, and thus easily agglomerate and oxidize. [10] This can lead to unexpected performance losses in practical applications. In addition, bare metal NPs are limited in complex functions, such as modulated carrier transport, enhanced molecular capture, and strong charge separation. In comparison, functional material-wrapped metal NPs have promising reductions in aggregation and can offer more complex functions. [11][12][13][14][15] Among these wrapped metal NPs, microporous shell-[such as silica, and metal-organic frameworks (MOFs)] coated systems have abundant micropores and a large specific surface area. They have great potential applications in molecular catalysis and gas sensing. [16][17][18][19][20][21][22][23] For example, a recent work reported by He, et al. shows that the MOF-5 wrapped Au NPs have a strong enrichment effect of CO 2 gas, thus enabling the detection of CO 2 gas via surface-enhanced Raman spectroscopy (SERS) effect of the Au core. [22] To date, the microporous materials wrapped on a plasmonic metal NPs mainly include MOFs and microporous silica. Microporous silica has only the value as a carrier, stabilizer (for anti-agglomeration or anti-oxidization), and linking ligand. Therefore, microporous-silica-wrapped metal NPs are difficult to offer complex functions (such as strong gas-solid interaction). In contrast, MOF-wrapped metal NPs can likely achieve more functions due to their relatively high chemical activity and other properties. [18][19][20][21][22] However, most MOFs have wide band gaps and are insulators, thus, it is difficult to achieve applications in carrier transport (such as photoelectric conversion and conductometric gas sensing). In addition, the MOF micropores are easily destroyed by acidic gases and even water vapor due to their relatively low structural stability, thus resulting in dramatic performance declines in practical applications.Microporous metal oxides such as titanium dioxide (TiO 2 ), tin oxide (SnO 2 ), and cerium oxide (CeO 2 ) [24][25][26][27] have good chemical stability, strong interactions with many kinds of gas molecules, and tunable carrier transport properties. Therefore, the microporous metal-oxide-wrapped plasmonic metal NPs are This work proposes a novel and simple synthesis method for microporous-ceria-wrapped gold (Au@mp-CeO 2 ) nanoparticles (NPs) based on linker molecule-induced stacking of ultrafine CeO 2 particles (or beads) on the surface of pre-prepared gold NPs. The resulting NPs have a uniform size and microporous CeO 2 shells with a mean thickness of 28 nm and porosity of 42%. The shell is highly tunable from about 4 to 30 nm thick.

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Section: Microporous-ceo 2 Wrapped Gold Npsmentioning

confidence: 68%

Microporous‐Ceria‐Wrapped Gold Nanoparticles for Conductometric and SERS Dual Monitoring of Hazardous Gases at Room Temperature

Bao

Guo

Zhang

et al. 2022

Adv Materials Inter

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“…Sensitivity for the detection of ammonium and organically bound nitrogen by ICP-AES in natural and waste waters has been improved by the development of a vapour generation method. 150 Ammonia vapour is generated by the addition of concentrated NaOH followed by detection at 174.273 nm using an axial ICP-AES instrument. Detection limits of 10-25 mg L À1 as N were achieved with an analytical precision of between 0.6 and 4.6% RSD for a concentration range of 25-1000 mg L À1 .…”

Section: Vapour Generation Methodsmentioning

confidence: 99%

“…The Sb V is detected after online reduction by HG-ICP-OES during the loading phase, Sb III is then eluted using 2 M HCl and detected without further reduction. For an 8 mL sample a preconcentration factor of 11 was achieved with a LOD of 90 ng L -1 for Sb III and 900 ng L -1 for Sb V ; the sum of Sb III and Sb V was in good agreement with the certified value of Sb for the CRM used and results by ICP-MS analysis of effluent waters.Sensitivity for the detection of ammonium and organically bound nitrogen byICP-AES in natural and waste waters has been improved by the development of a vapour generation method150 . Ammonia vapour is generated by the addition of concentrated NaOH followed by detection at 174.273 nm using an axial ICP-AES instrument.…”

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confidence: 99%

Atomic spectrometry update. Environmental analysis

Butler

Cairns

Cook

et al. 2010

J. Anal. At. Spectrom.

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This is the twenty-fifth annual review published in JAAS of the application of atomic spectrometry to the chemical analysis of environmental samples. This Update refers to papers published approximately between September 2008 and August 2009. In the analysis of air, work is focused on the need to collect and characterise ultrafines; determination of elements such as Be, Hg and PGEs in air samples; application of SRXRF techniques and advances in the development of field deployable aerosol mass spectrometry systems. In the analysis of water, significant areas of activity currently focus on elemental speciation of As, Cr, Hg and Sn. Work in increasing method sensitivities through the use of vapour generation and optimization of extraction and preconcentration procedures continues. The increased global awareness of the need to monitor levels of potentially toxic elements (PTE) in soils is desirable and this is reflected in a growing body of published literature from authors in the Middle East, Asia and Africa. However, a potential criticism of some studies is that they simply report the concentrations of analytes in particular soils or plants, without providing sufficient information on analytical quality control and with little assessment of their environmental significance, e.g. those levels that are a threat to human health. In the field of geological analysis, considerable effort is being spent not only on the production, characterization and certification of new geological reference materials, but also on enhancing the certification of existing reference materials and the development of reference materials with assigned elemental isotopic ratios. Laser ablation continues to go from strength to strength in being adopted as a solid sampling tool in geochemical analysis. Feedback on this review is most welcome and the lead author can be contacted using the email address provided.

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“…To further conrm that the problem was arising from air entrainment, ultra high purity argon gas was used to degas all solutions before their introduction into the ICP, which still resulted in inaccurate and imprecise results. Finally, the procedure of Jaber et al, 20 who performed the quantitative determination of ammonium and organic-bound nitrogen in aqueous and solid samples by ICP-OES through generation of ammonia vapour, reduced the N background signal relative to that arising from samples and standard solutions. Although this improved precision, inaccurate results still resulted.…”

Section: Optimization Of Experimental Conditionsmentioning

confidence: 99%

Towards the use of ICP-OES for the elemental analysis of organic compounds such as glucosamine

Odenigbo

Makonnen

Asfaw

et al. 2014

J. Anal. At. Spectrom.

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Inductively coupled plasma optical emission spectrometry with a long demountable torch (whose outer tube is 2.5 cm longer than a standard torch) and a conventional pneumatic nebulisation system was applied to the determination of C, H and O concentrations from an organic compound dissolved in water. The sample solution was simply aspirated directly into the plasma without any sample pre-treatment (such as desolvation or degassing). The long torch was required to significantly decrease the background arising from entrained air. Good linearity was obtained for C, N, H and O upon calibration with standard solutions prepared from ultrapure tris(hydroxymethyl)aminomethane.A weighed blank correction was applied to compensate for the contribution from water, especially in the cases of H and O. Under these conditions, the detection limits for C, N, H and O were, respectively, 0.2, 50, 1000 and 2000 mmol of analyte per g of solution.Accurate concentrations, according to a Student's t test at the 95% confidence level, were measured for C, H and O in a solution of D-glucosamine hydrochloride. No internal standardisation was necessary. However, the N concentration was biased high, irrespectively of the N emission line used (from 149.262 to 593.178 nm), which rules out spectroscopic interference and will be further investigated. Nonetheless, the possibility of accurately determining C, H and O simultaneously with trace elements makes the approach quite promising. It is much simpler than alternate methods that require derivatisation of the compound prior to detection.

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Determination of ammonium and organic bound nitrogen by inductively coupled plasma emission spectroscopy

Cited by 17 publications

References 16 publications

Microporous‐Ceria‐Wrapped Gold Nanoparticles for Conductometric and SERS Dual Monitoring of Hazardous Gases at Room Temperature

Microporous‐Ceria‐Wrapped Gold Nanoparticles for Conductometric and SERS Dual Monitoring of Hazardous Gases at Room Temperature

Atomic spectrometry update. Environmental analysis

Towards the use of ICP-OES for the elemental analysis of organic compounds such as glucosamine

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