Influence of operating conditions on the effects of acids in inductively coupled plasma atomic emission spectrometry

Fernández, Alberto; Murillo, Miguel; Carrión, Nereida; Mermet, Jean‐Michel

doi:10.1039/ja9940900217

Cited by 67 publications

(34 citation statements)

References 14 publications

(2 reference statements)

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“…Several authors applied experimental design techniques [13][14][15] or Simplex optimization procedures [16][17][18][19][20][21][22] to find true optimal conditions in ICP-OES determinations. Various analytical figures of merit were considered as response, such as net emission intensity 22 , signal-tobackground ratio 13,[17][18][19][20]22 , limit of detection 17 , magnesium ionic-to-atomic line intensity ratio 13,22 , extent of matrix interference 14,20,21 , long term-stability 15 . In this work, the experimental design procedure was applied to find the optimal operating conditions of an axially-viewed inductively coupled plasma-multichannel-based emission spectrometer using both ultrasonic and pneumatic nebulization.…”

Section: Introductionmentioning

confidence: 99%

Multivariate Optimization of an Axially‐Viewed Inductively Coupled Plasma Multichannel‐Based Emission Spectrometer for the Analysis of Environmental Samples

et al. 2005

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An experimental design procedure was applied to optimize the operating conditions of an axially-viewed inductively coupled plasma emission spectrometer instruments equipped with echelle optics with cross dispersion and charge transfer device. The multivariate effect of carrier gas flow rate and r.f. power on several analytical figures was investigated and discussed. Both ultrasonic and pneumatic nebulization were used. For the final choice of the optimum, different criteria were taken into account, mainly plasma robustness, instrumental precision, analyte and background net emission, detection limits and signal-to-background ratios. It was found that the use of moderate power (1100W) and mean carrier gas flow rate (0.75 L/min) allows to obtain sufficient plasma robustness, satisfactory precision, and excellent signal-to-background ratios and limits of detection, favorable for ultratrace element determinations in environmental matrices.

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Section: Introductionmentioning

confidence: 99%

Multivariate Optimization of an Axially‐Viewed Inductively Coupled Plasma Multichannel‐Based Emission Spectrometer for the Analysis of Environmental Samples

et al. 2005

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“…Some authors have indicated that the magnitude of the acid matrix effects strongly depends on the experimental conditions employed [10,28]. Taking into account this fact, the influence of the experimental variables (i.e., nebulizer gas flow rate, Q g , sample uptake rate, Q l , and r.f.…”

Section: Signal Profilesmentioning

confidence: 99%

Non-spectral interferences due to the presence of sulfuric acid in inductively coupled plasma mass spectrometry

García-Poyo¹,

Grindlay²,

Gras³

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…Such changes will increase the relative liquid density of the aerosol and then lower the aerosol transport rate to the plasma, leading to the drop in the signal intensity. 27,28,33 In addition, hydrogen is also important in the plasma, because its high thermal conductivity enables the energy transfer between the bulk of the plasma and the central channel, hence promoting analyte ionization. On a molar basis, H 2 O provides more H to the plasma than monoacid, indicating that in terms of hydrogen acid concentration increase may result in signal suppression.…”

Section: Signal Enhancementmentioning

confidence: 99%

“…The type of acid and its concentration affect the analyte signal, which can be attributed to acids' effects on aerosol generation, analyte transport, or changes in excitation and ionization processes within the plasma. [27][28][29][30][31][32][33] For most elements, the presence of an acid matrix can lead to signal depression compared to the H 2 O matrix. 27,28,34 However, using very low concentration acids could increase signals.…”

Section: Introductionmentioning

confidence: 99%

Matrix effects and mass bias caused by inorganic acids on boron isotope determination by multi-collector ICP-MS

Chen

Zhang

Wei

et al. 2016

J. Anal. At. Spectrom.

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The influence of inorganic acids (HCl, HNO 3 , and HF) on boron isotope measurement by using multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS) has been investigated. The acid concentration is in the range of 0-0.2 M. Generally, acids can enhance B signal intensities and reduce isotopic mass bias compared to that of the same B concentration in a H 2 O matrix. The signal enhancement in each acid matrix differs slightly, while B isotopic mass bias is significantly different among them, with the highest 11 B/ 10 B ratio in the HF matrix and the lowest in the HCl matrix. In HCl and HNO 3 matrices, boron isotopic mass bias reduces when the acid concentration goes up. However, such a scenario is not observed in the HF matrix. Furthermore, the 11 B/ 10 B ratio in the HF matrix is the same as that in the H 2 O matrix within the studied acid concentration (up to 0.2 M). This implies that changes in mass bias and the B signal cannot be related to the same process in ICP-MS. We suggest that B signal enhancement in inorganic acids can mainly be attributed to Coulomb fission during aerosol transport towards plasma, while boron ion redistributions in the plasma caused by matrix element (e.g. Cl, N) ionization lead to changes in isotopic mass bias. As acids can cause considerable matrix effects and mass bias for boron, acidity match between samples and standard solutions is imperative for accurate and precise B isotope measurement by MC-ICP-MS.

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Influence of operating conditions on the effects of acids in inductively coupled plasma atomic emission spectrometry

Cited by 67 publications

References 14 publications

Multivariate Optimization of an Axially‐Viewed Inductively Coupled Plasma Multichannel‐Based Emission Spectrometer for the Analysis of Environmental Samples

Multivariate Optimization of an Axially‐Viewed Inductively Coupled Plasma Multichannel‐Based Emission Spectrometer for the Analysis of Environmental Samples

Non-spectral interferences due to the presence of sulfuric acid in inductively coupled plasma mass spectrometry

Matrix effects and mass bias caused by inorganic acids on boron isotope determination by multi-collector ICP-MS

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