scholarly journals Petrography and Geochemistry of the Banded Iron Formation of the Gangfelum Area, Northeastern Nigeria

2017 ◽  
Vol 7 (1) ◽  
pp. 25
Author(s):  
Anthony Temidayo Bolarinwa
Keyword(s):  
Iron Oxide ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Iron Formation ◽  
Icp Oes ◽  
Banded Iron Formation ◽  
Basement Complex ◽  
Inductively Coupled ◽  
Iron Precipitation ◽  
Icp Ms

The Gangfelum Banded Iron Formation (BIF) is located within the basement complex of northeastern Nigeria. It is characterized by alternate bands of iron oxide and quartz. Petrographic studies show that the BIF consist mainly of hematite, goethite subordinate magnetite and accessory minerals including rutile, apatite, tourmaline and zircon. Chemical data from inductively coupled plasma optical emission spectrometer (ICP-OES) and inductively coupled plasma mass spectrometer (ICP-MS) show that average Fe2O3(t) is 53.91 wt.%. The average values of Al2O3 and CaO are 1.41 and 0.05 wt.% respectively, TiO2 and MnO are less than 0.5 wt. % each. The data suggested that the BIF is the oxide facies type. Trace element concentrations of Ba (67-332 ppm), Ni (28-35 ppm), Sr (13-55 ppm) and Zr (16-25 ppm) in the Gangfelum BIF are low and similar to the Maru and Muro BIF in northern Nigeria and also the Algoma iron formation from North America, the Orissa iron oxide facies of India and the Itabirite from Minas Gerais in Brazil. The evolution of the Gangfelum BIF involved metamorphism of chemically precipitated or rhythmically deposited iron-rich sediments into hematite-quartz rocks. The banding of the BIF suggested a break in iron precipitation probably due to iron oxide deficiency. 

Advantages, drawbacks and applications of mixed Ar–N2 sources in inductively coupled plasma-based techniques: an overview

2014 ◽  
Vol 6 (16) ◽  
pp. 6170-6182 ◽  
Author(s):  
G. L. Scheffler ◽  
D. Pozebon
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Mixed Gas ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Plasma Optical Emission Spectrometry

This review deals with mixed gas Ar–N2 plasmas, highlighting advantages, limitations and applications of them in inductively coupled plasma optical emission spectrometry (ICP OES), inductively coupled plasma mass spectrometry (ICP-MS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) techniques, covering publications in the last three decades.

Nanosecond laser ablation tandem inductively coupled plasma mass and optical emission spectrometry for micro-chemical elemental analysis

2017 ◽  
Vol 32 (11) ◽  
pp. 2246-2253 ◽  
Author(s):  
Gelian Gong ◽  
Saijun Sun ◽  
Jibin Zhou ◽  
Congyin Li ◽  
Xu Liang ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Nanosecond Laser ◽  
Icp Oes ◽  
Inductively Coupled ◽  
Concentration Determination ◽  
Nanosecond Laser Ablation ◽  
Icp Ms

Simultaneous in situ concentration determination by LA-ICP-MS and LA-ICP-OES.

scholarly journals Optimization of ICP-OES’S parameters for uranium analysis of rock samples

2021 ◽  
Author(s):  
Xiaozhe Li ◽  
Chao Xiong ◽  
Kun Sun ◽  
Fang Fang ◽  
Qingxian Zhang
Keyword(s):  
Quantitative Analysis ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Optical Emission ◽  
Volumetric Method ◽  
Icp Oes ◽  
Pumping Rate ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

AbstractCurrently, the quantitative analysis methods for uranium that are widely used in laboratories, such as the volumetric method and inductively coupled plasma mass spectrometry (ICP-MS) cannot achieve low cost, simple operation, and little influence by other elements. The inductively coupled plasma optical emission spectrometer (ICP-OES) has a wide linear range, and high stability, and can be used to identify multiple elements simultaneously. However, when ICP-OES is used for quantitative analysis of uranium, the settings for the RF power, nebulizer flow, and pump rate can affect the analysis results. In this work, these parameters were carefully optimized for identifying uranium. Based on experiments, we selected two spectrum peaks 409.014 nm and 424.167 nm for quantitative analysis with the lowest interference. The optimal parameters obtained are atomizer flow rate of 0.75 L/min, a sample pumping rate of 1.6 mL/min, and a high-frequency power of 1400 W. Then we compared the accuracy of the volumetric method, ICP-MS method and ICP-OES method with the optimized parameter for analysis of experimental samples and references. The results showed that the ICP-OES with the optimized parameters proposed in this paper can be used to perform a convenient, quick, and efficient quantitative analysis of uranium in minerals.

scholarly journals Determination of Macro, Micro and Toxic Elements using Argon-Based Plasma Spectroanalytical Methods in order to support Brazilian Regulations on Inorganic Constituents in Infant Foods

2021 ◽  
Vol 8 (10Years) ◽  
Author(s):  
Marcelo Tozo ◽  
Fernanda Pinheiro ◽  
Joaquim Nóbrega
Keyword(s):  
Inductively Coupled Plasma ◽  
Toxic Elements ◽  
Daily Intake ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Infant Foods ◽  
Inductively Coupled ◽  
Icp Ms

Children's cereal-based foods and supplements are widely consumed by newborn and infant population. The Resolution RDC no. 193/2017 of the Brazilian National Health Surveillance Agency (ANVISA) established maximum tolerated limits (MTL) for toxic elements in infant foods aiming to control health risks. Complementarily, the determination of macro and microelements based on values of recommended daily intake (RDI) is regulated by Resolution RDC no. 269/2005. Two analytical procedures were developed using inductively coupled plasma mass spectrometry (ICP-MS) for determination of As, Cd, Sn and Pb and inductively coupled plasma optical emission spectrometry (ICP OES) for determination of Ca, Fe, K, Mg, Mn, Na, P and Zn attending both Brazilian regulations. Microwave-assisted acid digestion of solid samples was carried out in closed vessels using 7 mol L-1 HNO3. Two rice flours reference materials as well as addition and recovery experiments were applied to check accuracy. Recoveries ranged from 70 to 128% for ICP OES and from 82 to 128% for ICP-MS using internal standardization. The analytical procedure presented LOQs lower than maximum limits allowed by both regulations. Fifteen samples of cereal-based infant foods were analyzed and all analyte concentrations were lower than the respective MTLs recommended by RDC no. 193, except to Pb concentration in one milk flour sample. According to the RDI established by RDC no. 269 and the average concentrations of Ca, Fe, K, Mg, Mn, P and Zn in samples, it was possible to assign a minimum mass value of food that meets the recommendations of the Brazilian resolution for different population groups.

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