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Flame atomic absorption spectrometry

Tìm thấy 20+ kết quả cho từ khóa "Flame atomic absorption spectrometry"

Development of a method for the determination of cadmium levels in seawater by flame atomic absorption spectrometry using an online cloud-point extraction system

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Development of a method for the determination of cadmium levels in seawater by flame atomic absorption spectrometry using an online cloud-point extraction. Abstract: A new system was developed for the preconcentration and determination of cadmium levels in water following online cloud-point extraction and analysis by flame atomic absorption spectrometry.

A simple and efficient approach for preconcentration of some heavy metals in cosmetic products before their determinations by flame atomic absorption spectrometry

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Abstract: In the current study, a simple and efficient analytical method for preconcentration and determination of Cd(II), Pb(II), and Sn(II) in some cosmetic samples, using ultrasonic assisted-cloud point extraction and flame atomic absorption spectrometry, was developed.

An application of coacervate-based extraction for the separation and preconcentration of cadmium, lead, and nickel ions prior to their determination by flame atomic absorption spectrometry in various water samples

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When considering speed, cheapness, and ease of use, flame atomic absorption spectrometry (FAAS) is one of the most popular spectroscopic methods. 11 In order to eliminate these handicaps a preconcentration/separation step is applied before analysis. Cloud point extraction (CPE) is one of the most popular coacervate-based extraction techniques. Formation of micellar aggregates in aqueous solutions of nonionic surfactants lies at the basis of the CPE technique.

Speciation of chromium by the combination of dispersive liquid–liquid microextraction and microsample injection flame atomic absorption spectrometry

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Key words: Microextraction, chromium, Sudan blue II, speciation, preconcentration, microsample injection, atomic absorption spectrometry.

Ultrasound-assisted emulsification–solidified floating organic drop microextraction combined with flow injection–flame atomic absorption spectrometry for the determination of palladium in water samples

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spectrometry for the determination of palladium in water samples. Abstract: The ultrasound-assisted emulsification–solidified floating organic drop microextraction (USAE–SFODME) methodology was combined with flow injection–lame atomic absorption spectrometry (FI–FAAS) for the separation/pre- concentration and determination of palladium at ultratrace level.

Multiple objective optimization of air assisted liquid-liquid microextraction combined with solidified floating organic drop microextraction for simultaneous determination of trace copper and nickel

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Combination of dispersive liquid–liquid microextraction with flame atomic absorption spectrometry using microsample introduction for determination of lead in water samples. Surfactant-assisted emulsification and surfactant-based dispersive liquid–liquid microextraction method for determination of Cu (II) in food and water samples by flame atomic absorption spectrometry.

Phân tích đồng thời các dạng Dimethyldiselenite, Selenomethioline, Selenit and Selenat trong mẫu thủy hải sản

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Irgolic (1999), “Determination of trimethylselenoniumiodide, selenmethionin, selenious acid, and selenic acid using highperformance liquid chromatography with on-line detection by inductively coupled plasma mass spectrometry or flame atomic absorption spectrometry”, Journal of Chromatography A, 830(2), pp. Uden (2000),“Speciesselective determination of seleniumcompounds in biological materials”, Pure Appl.

Vortex-assisted magnetic solid phase extraction of Pb and Cu in some herb samples on magnetic multiwalled carbon nanotubes

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Solid-phase extraction of Fe(III), Pb(II) and Cr(III) in environmental samples on amberlite XAD-7 and their determinations by flame atomic absorption spectrometry. Journal of Hazardous Materials 149. Flame atomic absorption spectrometric determination of Pb(II) and Cd(II) in natural samples after column graphene oxide-based solid phase extraction using 4-Acetamidothiophenol. Journal of the Brazilian Chemical Society 2014.

TCVN 6096-Nuoc Uong Dong Chai

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Phương pháp sắc ký khí lỏng với đầu dò tia cực tím).APHA 2120, Color (Xác định mầu sắc).APHA 3111, Metals by flame atomic absorption spectrometry (Xác định kim loại bằngquang phổ hấp thụ nguyên tử ngọn lửa)APHA 3112, Metals by cold-vapor atomic absorption spectrometry (Xác định kim loại bằngquang phổ hấp thụ nguyên tử hơi lạnh).APHA 3113, Metals by electrothermal atomic absorption spectrometry (Xác định kim loại bằng quang phổ hấp thụ nguyên tử nhiệt điện).APHA 3114, Arsenic and selenium by hydride

TCVN 6213-2004-Nuoc Khoang Thien Nhien Dong Chai

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Phương pháp sắc ký lỏng với đầu dò tia cực tím).APHA 2120, Color (Xác định màu sắc).APHA 2320, Alkalinity (Xác định tính kiềm).APHA 3111, Metals by flame atomic absorption spectrometry (Xác định kim loại bằng quang phổhấp thụ nguyên tử ngọn lửa).APHA 3112, Metals by cold – vapor atomic absorption spectrometry (Xác định kim loại bằngquang phổ hấp thụ nguyên tử hơi lạnh).APHA 3113, Metals by electrothermal atomic absorption spectrometry (Xác định kim loại bằngquang phổ hấp thụ nguyên tử nhiệt điện)

Spectrophotometric determination of mercury using vortex-assisted liquid–liquid microextraction

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DLLME), 20 dispersive liquid-phase microextraction (DLPME), 21 task-specific ionic liquid-based ultrasound- assisted dispersive liquid-phase microextraction (UA–IL–DLPME), 22 and ionic liquid-based vortex assisted liquid–liquid microextraction (IL–VALLME) 23 coupled with a variety of spectrometric detection techniques, such as graphite furnace atomic absorption spectrometry (GFAAS), 18 − 20 flame atomic absorption spectrometry (FAAS), 21 cold vapor atomic absorption spectrometry (CV–AAS), 15,22 flow

Preparation of Fe3O4 @ montmorillonite composite as an effective sorbent for the removal of lead and cadmium from wastewater samples

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The concentrations of analytes were determined by high resolution continuum source flame atomic absorption spectrometry. Under optimized conditions, lead and cadmium were quantitatively removed from wastewater (between 95% and 98%) in a contact time of less than 5 min. The results showed that Fe 3 O 4 @ montmorillonite can be efficiently used for the removal of lead and cadmium from aqueous solutions..

Development of a sample preparation strategy for the determination of tungsten in soil samples by inductively coupled plasma mass spectrometry using a response surface methodology

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Spectrophotometric 9,15 or spectrofluorometric methods, X-ray fluorescence spectroscopy, 9,16 neutron activation analysis, flame atomic absorption spectrometry, catalytic current polarography, 9 inductively coupled plasma optical emission spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP- MS), 9,17,18 and hyphenated liquid chromatography interfaced to ICP-MS techniques 5,19 are some of the chief ones that have been used. 5 Nevertheless, these existing methodological approaches

Luận văn Thạc sĩ Khoa học: Nghiên cứu hoàn thiện quy trình phân tích chì trong sản xuất thuốc gợi nổ chì azotua bằng phương pháp quang phổ hấp thụ nguyên tử

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Kết quả phân tích mẫu thực tế bằng phƣơng pháp F-AAS. 6 F-AAS Phương pháp phân tích Phổ hấp thụ nguyên tử ngọn lửa (Flame atomic absorption spectrometry). 7 GF-AAS Phương pháp phân tích Phổ hấp thụ nguyên tử không ngọn lửa (Graphite furnace atomic absorption spectrometry). Kết quả xác định hiệu xuất thu hồi bằng phương pháp thêm chuẩn. Kết quả khảo sát ảnh hưởng của các yếu tố đến hàm lượng chì xác định theo phương pháp chuẩn độ thể tích.

Spectrophotometric determination of molybdenum using surfactant-mediated liquid–liquid extraction

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Although there are several highly sensitive analytical techniques for determination of molybdenum, such as inductively coupled plasma atomic emission spectrometry, 8 inductively coupled plasma mass spectrometry, 9 flame atomic absorption spectrometry, 10 and neutron activation analysis, 11 these techniques require the use of rather sophisticated and high cost instruments..

Analytical capabilities of two-phase hollow-fiber liquid phase microextraction for trace multielement determination in aqueous samples by means of portable total reflection X-ray instrumentation

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absorption spectrometry (ETAAS), flame atomic absorption spectrometry (FAAS), or electrothermal vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS).

Preconcentration of rifampicin prior to its efficient spectroscopic determination in the wastewater samples based on a nonionic surfactant

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The application of cloud point preconcentration for the determination of Cu in real samples by flame atomic absorption spectrometry. doi: 10.1016/S0026-265X(01)00113-8. Combination of micellar extraction and GC-ECD for the determination of polychlorinated biphenyls (PCBs) in water. doi: 10.1007/s . Development of cloud point extraction for simultaneous extraction and determination of gold and palladium using ICP-OES.

Ultrasound assisted supramolecular liquid phase microextraction procedure for Sudan I at trace level in environmental samples

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Determination of copper using supramolecular solvent-based microextraction for food, spices, and water samples prior to analysis by flame atomic absorption spectrometry. Turkish Journal of Chemistry 2017. Journal of Molecular Liquids 2021. Arabian Journal of Geosciences 2021. A green and simple liquid-phase microextraction based on deep eutectic solvent for the erythrosine prior to its UV–. Journal of the Iranian Chemical Society 2020. Journal of AOAC International 2021.

Catalytic application of 1,3,5-triazine-pentaethylenehexamine polymer-supported palladium nanoparticles in the convenient reduction of nitroarenes with sodium borohydride or hydrazine

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The palladium level in the final solution was determined using flame atomic absorption spectrometry.. Reuse of the catalyst. After the reactions, the catalyst (TAPEHA-PdNPs) was filtered off and washed thoroughly with acetone, and then dried in air for use in another reduction. The catalyst was able to be reused more than ten times without any decrease in catalytic activity (Figure 6).. Reusability of TAPEHA-PdNPs for the reduction of nitrobenzene.

Chromate surface-imprinted silica gel sorbent for speciation of Cr in surface waters

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Aliquots (0.2 mL) of the supernatant solution were recurrently removed and Cr was measured by electrothermal atomic absorption (ETAAS). Results obtained showed that retention of Cr(VI) is a relatively fast process and 20 min is completely enough to achieve quantitative sorption.. For this purpose, increasing amounts (2–30 µg) of Cr(VI) anions were added to 50 mg of sorbent and the equilibrium chromium concentration after adsorption was measured by flame atomic absorption spectrometry (FAAS).