Optimization of operating conditions of axially and radially viewed plasmas for the determination of trace element concentrations from ultrasound-assisted digests of soil samples contaminated by lead pellets

Väisänen, Ari; Ilander, Aki

doi:10.1016/j.aca.2006.04.023

Cited by 9 publications

(8 citation statements)

References 38 publications

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“…The obtained tendencies of MgII/MgI as a function of F N and P were similar to those previously reported [23][24][25][26][27][28]. As a result, the plasma robust conditions selected were P¼ 1.4 kW and F N ¼0.8 L min À 1 ; whereas the nonrobust conditions were P¼ 0.9 kW and F N ¼1.3 L min À 1 .…”

Section: Study and Selection Of Plasma Operating Conditionssupporting

confidence: 86%

Multielemental inductively coupled plasma optical emission spectrometry analysis of nickeliferous minerals

Peña

Larrea²,

Villanueva-Tagle

et al. 2014

Talanta

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An inductively coupled plasma optical emission spectrometry method for the quantitative simultaneous determination of Al, Ca, Co, Cu, Cr, Fe, K, Mg, Mn, Na, Ni, P and Zn in Cuban laterite and serpentine minerals has been developed. Additionally, V and Ti can be quantitatively determined in laterite mineral; Li, Sr, and Zr can be detected in both mineral types and Pb can be detected just in laterite mineral. The microwave-assisted total acid digestion of samples was achieved with HCl+HNO3+HF and HNO3+HClO4+HF acid mixtures for laterite and serpentine samples, respectively. In non-robust plasma operating conditions, the matrix effect characteristics of the laterite sample were dictated by the principal component Fe; while the character of the Mg principal component matrix effect was some how modified by the concomitants Fe and Ni in serpentine sample. The selection of robust conditions decreased the matrix effect. Additionally, the simulation of the matrix samples by introducing the principal component Fe or Mg, correspondingly, in calibration dissolutions was needed to overcome completely the matrix effect over the analysis accuracy. Precision of analysis was very near or lower than 10% for most elements, except Sr (15%) in L-1; and K (15%) and Li (15%) in SNi sample. Accuracy of analysis was around or lowers than 10% for most elements, except K (15%), Na (19%), P (19%) and V (19%) in L-1 sample; and Ca (14%) and P (20%) in SNi sample.

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Section: Study and Selection Of Plasma Operating Conditionssupporting

confidence: 86%

Multielemental inductively coupled plasma optical emission spectrometry analysis of nickeliferous minerals

Peña

Larrea²,

Villanueva-Tagle

et al. 2014

Talanta

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“…The total digestion methods, with conventional digestion procedures such as the use of fluxes or inorganic acids, i.e., HCl, H 3 PO 4 , HNO 3 , HClO 4 , HF, H 2 SO 4 or their combinations, are labor-intensive and tedious, and often may result in contamination. The more modern methods used are microwaveassisted digestion/ leaching (16,17) and ultrasound-assisted leaching (18). These methods greatly reduce the analysis time, their 'closed operation' can minimize or eliminate contamination, prevent loss of volatile species (i.e., Se, As, and Hg), use lower sample size and less reagent, and aid in operator safety.…”

Section: Introductionmentioning

confidence: 99%

“…Lead (Pb) is nonessential and may exhibit extreme toxicity even at low levels. For these reasons, the monitoring of trace metals in agricultural soils is essential (5,6).…”

mentioning

confidence: 99%

Development of a Method for the Microwave-assisted Digestion of Soils Using Dilute Acids and the Simultaneous Determination of 18 Trace Elements by Inductively Coupled Plasma Mass Spectrometry

Chandrasekaran¹

2015

At.Spectrosc.

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“…Conversely, major and trace elements, specially toxic elements like As, Cd, Cr, Hg, and Pb are extensively discussed in the literature. [26][27][28][29][30] In this work, the operating conditions of ICP OES were optimized aiming for reaching the best conditions for REEs determination (La, Nd, Eu, Gd, Dy, Er and Yb) based on robustness and sensitivity. Two different parameters were evaluated and compared as responses to obtain the optimum conditions: Mg II/Mg I line intensity ratio and SBR values of the REEs.…”

Section: Introductionmentioning

confidence: 99%

“…This concept has become quite common in ICP optimization studies and can be easily measured using ionic-to-atomic line intensity ratio as Mg II (280 nm) and Mg I (285 nm). 27,36,[40][41][42] Since ionic lines are more sensitive to changes in atomization and excitation conditions than atomic lines, the intensity ratio of the lines is a practical criterion to evaluate the plasma robustness and analytical performance. A robust condition can be achieved when higher RF applied power level (≥ 1200 W) is combined with lower nebulizer gas flow rate (≤ 0.6 L min -1 ) 37,38,43,44 and this condition is characterized by the high intensity ratio of Mg II/Mg I, values above 8.…”

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confidence: 99%

Evaluation of signal-to-background and Mg II/Mg I ratios as response for the optimization of rare earth elements determination by inductively coupled plasma optical emission spectrometry

Guimarães-Silva

Lena

Froes

et al. 2012

J. Braz. Chem. Soc.

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Elementos terras raras (ETR) fazem parte de um grupo peculiar de elementos químicos e sua determinação em amostras geológicas é importante e complexa, devido às baixas concentrações e problemas com interferências espectrais e não espectrais. Neste trabalho, planejamentos experimentais foram utilizados para otimizar as condições operacionais de um espectrômetro de emissão óptica com plasma indutivamente acoplado (ICP OES) para a determinação de ETR. A razão entre o sinal analítico dos ETR e o sinal de fundo (SBR) e a razão Mg II/Mg I foram avaliadas como respostas na otimização. De acordo com os resultados obtidos, três diferentes condições de operação foram selecionadas e classificadas como robusta, semi-robusta e melhor SBR. Limites de detecção (LOD), SBR e desvio padrão relativo de medidas de uma solução do branco (DPR branco ) foram determinados. Na condição semi-robusta (potência de 1250 W e vazão do gás nebulizador de 0,90 L min −1 ) foram obtidos LOD e DPR branco mais baixos que nas outras condições estabelecidas.Rare earth elements (REEs) is a peculiar group of chemical elements. Their determination in geological samples is important and complex due to their low concentrations and problems with spectral and non-spectral interferences. Herein, the operating conditions of an inductively coupled plasma optical emission spectrometer were optimized for the determination of REEs using experimental designs. The signal-to-background ratio (SBR) of the REEs emission signals and the Mg II/Mg I line intensity ratio were evaluated as response functions. According to the results obtained, three different sets of operating conditions were selected and classified as robust, semi-robust and best SBR conditions. Limits of detection (LOD), SBR and relative standard deviation of the blank solution (RSD blank ) were determined. The semi-robust condition (RF power of 1250 W and nebulizer gas flow rate of 0.90 L min −1 ) exhibited lower LOD and RSD blank than others tested operating conditions. Keywords: rare earth elements, ICP OES, optimization, SBR, Mg II/Mg I IntroductionInductively coupled plasma optical emission spectrometry (ICP OES) has been widely used for multielement analysis and is recognized as one of the most effective techniques for determination of major, minor and trace elements including the rare earth elements (REEs) in geological samples with complex matrices. [1][2][3][4] Recently, inductively coupled plasma mass spectrometry (ICP-MS) has shown to be a powerful tool for the direct determination of REEs, but it is still too expensive and unavailable for many laboratories. On the other hand, ICP OES is more affordable and shows good analytical qualities, such as precision and accuracy, relatively low limits of detection, high sample throughput, simultaneous determination of most elements and wide dynamic range. [5][6][7] From a geological point of view, the determination of REEs is vital to understand the geochemical processes in Evaluation of Signal-to-Background and Mg II/Mg I Ratios J. Braz. Chem. Soc. 7...

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Optimization of operating conditions of axially and radially viewed plasmas for the determination of trace element concentrations from ultrasound-assisted digests of soil samples contaminated by lead pellets

Cited by 9 publications

References 38 publications

Multielemental inductively coupled plasma optical emission spectrometry analysis of nickeliferous minerals

Multielemental inductively coupled plasma optical emission spectrometry analysis of nickeliferous minerals

Development of a Method for the Microwave-assisted Digestion of Soils Using Dilute Acids and the Simultaneous Determination of 18 Trace Elements by Inductively Coupled Plasma Mass Spectrometry

Evaluation of signal-to-background and Mg II/Mg I ratios as response for the optimization of rare earth elements determination by inductively coupled plasma optical emission spectrometry

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