Determination of trace elements in sea-water by inductively coupled plasma mass spectrometry after preconcentration by formation of water-soluble complexes and their adsorption onC18-bonded silica gel

Akatsuka, Kunihiko; Suzuki, Takahiro; Nobuyama, Naoki; Hoshi, Suwaru; Haraguchi, Kensaku; Nakagawa, Kōichi; Ogata, Toshio; Kato, Takemi

doi:10.1039/a708837j

Cited by 22 publications

(11 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since Olsen et al (1983) first integrated sample pretreatment on-line by combining an SPE column with an FI system, several environmental and biological applications have been reported with various sorbents-such as Chelex-100 (Nicolaï et al, 1999), silica-immobilized 8-hydroxyquinoline (I-8-HOQ; Hirata et al, 2003), C 18 -bonded silica gel (Akatsuka et al, 1998), and polymer sorbents (Bohrer et al, 1999)-for the simultaneous determination of trace and major elements in saline samples. Among the commercially available chelation-exchange substrates, iminodiacetate-based resins, such as Chelex-100, Muromac-A1, and Dowex A-1, have become the best-characterized in terms of their applications (Ebdon et al, 1991).…”

Section: In Vivo Monitoring Of the Transfer Kineticsmentioning

confidence: 99%

In vivomonitoring of the transfer kinetics of trace elements in animal brains with hyphenated inductively coupled plasma mass spectrometry techniques

Su¹,

Sun²,

Tzeng³

et al. 2009

Mass Spectrom. Rev.

View full text Add to dashboard Cite

The roles of metal ions to sustain normal function and to cause dysfunction of neurological systems have been confirmed by various studies. However, because of the lack of adequate analytical method to monitor the transfer kinetics of metal ions in the brain of a living animal, research on the physiopathological roles of metal ions in the CNS remains in its early stages and more analytical efforts are still needed. To explicitly model the possible links between metal ions and physiopathological alterations, it is essential to develop in vivo monitoring techniques that can bridge the gap between metalloneurochemistry and neurophysiopathology. Although inductively coupled plasma mass spectrometry (ICP-MS) is a very powerful technique for multiple trace element analyses, when dealing with chemically complex microdialysis samples, the detection capability is largely limited by instrumental sensitivity, selectivity, and contamination that arise from the experimental procedure. As a result, in recent years several high efficient and clean on-line sample pretreatment systems have been developed and combined with microdialysis and ICP-MS for the continuous and in vivo determination of the concentration-time profiles of metal ions in the extracellular space of rat brain. This article reviews the research relevant to the development of analytical techniques for the in vivo determination of dynamic variation in the concentration levels of metal ions in a living animal.

show abstract

Section: In Vivo Monitoring Of the Transfer Kineticsmentioning

confidence: 99%

In vivomonitoring of the transfer kinetics of trace elements in animal brains with hyphenated inductively coupled plasma mass spectrometry techniques

Su¹,

Sun²,

Tzeng³

et al. 2009

Mass Spectrom. Rev.

View full text Add to dashboard Cite

show abstract

“…In fact, owing to the higher plasma robustness promoted by N 2 , addition of this molecular gas has found valuable application to complex samples analysis such as seawater, soil digests, slurries and other matrices. [7][8][9][10][11][12][13][14][15][16] In addition, Ar-N 2 -ICP proved its usefulness in reducing oxides and Ar polyatomic ions, which are interferents in ICP-MS. [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] Researches dealing with the use of Ar-N 2 -ICP in axially viewed plasma in ICP OES have been quite limited. Ohata et al 36 demonstrated that plasma robustness (i.e., Mg(II)/Mg(I) ratio) was improved by using 1.3% of N 2 in the outer gas, whereas the robustness remained constant under higher amounts of N 2 .…”

Section: Introductionmentioning

confidence: 99%

Effect of N₂ on the emission profile and excitation temperature in axially viewed plasma-ICP OES

Scheffler

Pozebon

2015

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

Fundamental studies were conducted in order to gain useful insights about energy transfer that takes place when a low flow (20 mL min -1 ) of N 2 is introduced into the central channel of the Ar-ICP source in inductively coupled plasma optical emission spectrometry (ICP OES). Axial and radial emission profiles of Mg(I), Mg(II) and Ar(I) were collected along and across the central channel of both Ar-ICP and Ar-N 2 -ICP. Axial profiles indicated a more energetic plasma close and above the load coil when N 2 was added. On the other hand, radial profiles suggested a wider and more uniform central channel with the N 2 flow addition. By computing the plasma robustness (Mg(II)/Mg(I) ratio) across the central ICP channel, it was found a low (and uniform) energy coupling among the bulk plasma and the central channel of the Ar-ICP, which was significantly improved by adding N 2 . The results obtained also suggested that N 2 plays an important role locally, but does not in the outer regions of the ICP, which in turn denoted an unlikely N 2 diffusion. The better excitation conditions caused by N 2 were confirmed by measuring the excitation temperature in the central channel of the ICP, using a set of Fe ionic lines, where the excitation temperature increased from 7480K to 7910K. The effectiveness of the improved plasma robustness was evaluated for diluted seawater and the results demonstrated that the analyte signal suppression induced by the concomitants was reduced. Accuracy was accessed by analyzing certified reference samples (water and sediment), whereas good agreement among the concentrations found and those certified were observed. These results indicated low background and absence of spectral interferences caused by N 2 . The estimated detection limits for both Ar-ICP and Ar-N 2 -ICP were fairly comparable, revealing that the mixed-gas plasma is a robust source for trace elements determination using axially viewed-ICP OES. It was concluded that adding a low flow of N 2 is a simple way to increase plasma robustness without sacrificing analyte sensitivity.

show abstract

“…Thus far, a number of spectroscopic techniques such as ame atomic absorption spectrometry (FAAS), [3][4][5][6] graphite furn ace ato m ic ab sorp tio n spectrosco py (GFAAS), 7,8 spectrophotometry, 9 -11 electrothermal (ET) atomization, 12,13 conductimetry, 14,15 inductively coupled plasmas optical emission spectroscopy (ICP-OES), 16,17 and inductively coupled plasma m ass spectroscopy (ICP-MS) [18][19][20] have been widely applied to the determination of Pb. Flow-injection (FI) analysis has been popularly combined with the above techniques.…”

Section: Introductionmentioning

confidence: 99%

Flow-Injection Inductively Coupled Plasma Mass Spectrometer Incorporated with an Ultrasonic Nebulizer-Membrane Dryer: Application to Trace Lead Detection in Aqueous Solution and Seawater

Huang

et al. 2001

Appl Spectrosc

View full text Add to dashboard Cite

Flow-injection (FI) incorporated with inductively coupled plasma mass spectrometry (ICP-MS) was used to determine lead in aqueous solutions and seawater. Lead was retained in the form of Pb-DDPA complex in a sorbent microcolumn packed with C18-bonded silica, and then carried to an ultrasonic nebulizer with methanol as eluent. The ultrasonic nebulizer removed about 66% of methanol solvent vapors from entering the detector. A multi-tube Nafion® membrane dryer, installed along the passage prior to the ICP torch, further removed 50% of methanol. Reducing the amount of methanol solvent significantly improved the signal-to-background ratio of the detector. Accordingly, when the sample was loaded for 15 and 60 s, respectively, Pb detection limits were determined to be 0.162 and 0.028 ng/L, one to two orders of magnitude lower than those reported. The enrichment factors were also measured to be 7 and 28, with the sampling frequencies of 31 and 21 h−1, respectively. The method was applied for the determination of Pb in a reference seawater. The obtained result was 0.013 ± 0.001 ng/mL, consistent with the certified value of 0.013 ± 0.005 ng/mL.

show abstract

Determination of trace elements in sea-water by inductively coupled plasma mass spectrometry after preconcentration by formation of water-soluble complexes and their adsorption onC18-bonded silica gel

Cited by 22 publications

References 14 publications

In vivomonitoring of the transfer kinetics of trace elements in animal brains with hyphenated inductively coupled plasma mass spectrometry techniques

In vivomonitoring of the transfer kinetics of trace elements in animal brains with hyphenated inductively coupled plasma mass spectrometry techniques

Effect of N₂ on the emission profile and excitation temperature in axially viewed plasma-ICP OES

Flow-Injection Inductively Coupled Plasma Mass Spectrometer Incorporated with an Ultrasonic Nebulizer-Membrane Dryer: Application to Trace Lead Detection in Aqueous Solution and Seawater

Contact Info

Product

Resources

About

Determination of trace elements in sea-water by inductively coupled plasma mass spectrometry after preconcentration by formation of water-soluble complexes and their adsorption onC18-bonded silica gel

Cited by 22 publications

References 14 publications

In vivomonitoring of the transfer kinetics of trace elements in animal brains with hyphenated inductively coupled plasma mass spectrometry techniques

In vivomonitoring of the transfer kinetics of trace elements in animal brains with hyphenated inductively coupled plasma mass spectrometry techniques

Effect of N2 on the emission profile and excitation temperature in axially viewed plasma-ICP OES

Flow-Injection Inductively Coupled Plasma Mass Spectrometer Incorporated with an Ultrasonic Nebulizer-Membrane Dryer: Application to Trace Lead Detection in Aqueous Solution and Seawater

Contact Info

Product

Resources

About

Effect of N₂ on the emission profile and excitation temperature in axially viewed plasma-ICP OES