Method development for the determination of manganese, cobalt and copper in green coffee comparing direct solid sampling electrothermal atomic absorption spectrometry and inductively coupled plasma optical emission spectrometry

Abstract Phytopharmaceuticals containing Valerian are used as mild sleep-inducing agents. The elemental composition of 3 different marks of Valeriana officinalis roots commercially available in the Argentinian market, their teas, and a commercial tincture have been studied. The content of Al, Ca, Cd, Co, Cr, Cu, Fe, Li, Mn, Ni, Pb, V, and Zn was determined in phytopharmaceuticals by flame atomic emission/absorption spectrometry, electrothermal atomic absorption spectrometry, and ultrasonic nebulization coupled to inductively coupled plasma-optical emission spectrometry. Prior to analyses of the samples, a digestion procedure was optimized. The analytical results obtained for Fe, Al, Ca, and V in the solid sample study were within the range 100–1000 mg/kg, and for Mn, Zn, and Pb within the range 10–100 mg/kg. Cadmium was found at levels up to 0.0125 mg/kg.

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Determination of heavy metal content in whey protein samples from markets in Giza, Egypt, using inductively coupled plasma optical emission spectrometry and graphite furnace atomic absorption spectrometry: A probabilistic risk assessment study

Journal of Food Composition and Analysis ◽

10.1016/j.jfca.2019.103300 ◽

2019 ◽

Vol 84 ◽

pp. 103300 ◽

Cited By ~ 6

Author(s):

Sherif M. Elgammal ◽

Mona A. Khorshed ◽

Eman H. Ismail

Keyword(s):

Inductively Coupled Plasma ◽

Graphite Furnace ◽

Optical Emission ◽

Absorption Spectrometry ◽

Emission Spectrometry ◽

Inductively Coupled ◽

Assessment Study ◽

Graphite Furnace Atomic Absorption ◽

Plasma Optical Emission Spectrometry

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Performance Parameters of Inductively Coupled Plasma Optical Emission Spectrometry and Graphite Furnace Atomic Absorption Spectrometry Techniques for Pd and Pt Determination in Automotive Catalysts

Materials ◽

10.3390/ma13225136 ◽

2020 ◽

Vol 13 (22) ◽

pp. 5136

Author(s):

Marin Senila ◽

Oana Cadar ◽

Lacrimioara Senila ◽

Sarah Böringer ◽

Karine Seaudeau-Pirouley ◽

...

Keyword(s):

Inductively Coupled Plasma ◽

Graphite Furnace ◽

Optical Emission ◽

Absorption Spectrometry ◽

Emission Spectrometry ◽

Icp Oes ◽

Inductively Coupled ◽

Graphite Furnace Atomic Absorption ◽

Plasma Optical Emission Spectrometry

Palladium (Pd) and platinum (Pt) are extensively used as catalysts in the petrochemical and automotive industries, and due to high demand for them on the market, their recycling from spent supported catalysts is clearly needed. To assess the content of Pd and Pt in catalysts in order to establish their commercial value or to evaluate the recovery efficiency of technologies used for recycling, reliable analytical methods for determination of these elements are required. Spectrometric methods, such as inductively coupled plasma optical emission spectrometry (ICP-OES) and graphite furnace atomic absorption spectrometry (GFAAS) are powerful tools that can be employed for the determination of Pd and Pt in various sample matrices. However, these methods allow only the injection of liquid samples. In this regard, the digestion of solid sample by microwave-assisted acid extraction procedures at high pressures and temperatures is often used. In this study, a microwave acid digestion method was optimized for the extraction of Pd and Pt from spent catalysts, using a four-step program, at a maximum 200 °C. The resulting solutions were analyzed using ICP-OES, at two different wavelengths for each metal (Pd at 340.458 and 363.470 nm, and Pt at 265.945 and 214.423 nm, respectively) and using GFAAS (Pd at 247.64 nm, Pt at 265.94 nm). Five types of spent catalyst were analyzed and the standard deviations of repeatability for five parallel samples were less than predicted relative standard deviations (PRSD%) calculated using Horvitz’s equation for all the analyzed samples.

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