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1 edition of The rapid acid digestion of activated carbon and resin in a microwave oven found in the catalog.

The rapid acid digestion of activated carbon and resin in a microwave oven

G.M. Russell

The rapid acid digestion of activated carbon and resin in a microwave oven

by G.M. Russell

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  • 34 Currently reading

Published by Council for Mineral Technology in Randburg, South Africa .
Written in English


The Physical Object
Pagination3 p.
ID Numbers
Open LibraryOL24722601M

OPTIMIZATION OF MICROWAVE-ASSISTED ACID DIGESTION METHOD FOR DETERMINATION OF TRACE ELEMENTS IN COAL AND COAL FLY ASH Dejan Savic J 65 Pages Directed by: Dr. Wei-Ping Pan Department of Chemistry Western Kentucky University Abstract In most of the analytical and environmental laboratories today inductively. The adsorption performanceof activated carbon mostlydepends on theporous structure ofthe activated carbon (Abril et al., ). Activated carbon regeneration by hot steam decreases the adsorbent capacity and damages the surface structure (Ania et al., ; Chen et al., ), resulting in short-term use and disposal. Therefore.

The use of microwave digester for digestion of alloy and slag samples of smelted ocean bed polymetallic nodules has permitted the complete digestion of samples, thereby replacing the tedious classical methods of digestion of samples. The digestion procedure includes two acid-closed digestions of samples in a microwave oven. Owing to the hazardous nature of Author: Kumari Smita, Saurabh Kumar Singh, Brajesh Kumar. Preparation and Characterization of Activated Carbon from Apple Waste by Microwave-Assisted Phosphoric Acid Activation: Application in Methylene Blue Adsorption Activated carbons (ACs) prepared from apple pulp and apple peel with phosphoric acid as an activation agent under microwave radiation were investigated.

heated at ºC. For microwave acid digestion procedures, an aliquot of samples to be digested ( g) were placed in the clean Teflon dig estion v essel with concentr ate acid mixtur e HNO 3: HF = (A), v/v, for first microwave acid digestion procedure and HNO 3: HF: HCl = (B), v/v/v in the second micr owav e dig estion pr.   Discussion. The results observed in Tables 1 and and2 2 shows excellent recoveries for most of the elements that exist in the milk powder and rice flour SRM samples. Nevertheless, the results shown in Tables 3 and and4 4 for the analysis of peach and spinach leaves SRMs, respectively revealed that the recoveries for Al, Cu, Zn, V, Mo, and Ni are not as Cited by: 2.


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The rapid acid digestion of activated carbon and resin in a microwave oven by G.M. Russell Download PDF EPUB FB2

I am trying to analyse silver content in samples of the industrial prepared activated charcoal, which has been treated with AgNO 3 solution in ammonia.

Silver concentration is 0,5%. A rapid sample-digestion method for the determination of toxic metals, cadmium, chromium, and lead, in polyethylene and polyvinyl chloride has been developed by using a microwave oven for.

By contrast, in the case of activated carbons, microwave heating has mainly been used for the rapid elimination of surface functionalities that are often present on the carbon surface. Thus, microwave heating has been used to remove oxygen functionalities and produce a highly-basic activated carbon in just a few minutes, basic properties Cited by: Microwave-assisted acid digestion.

Masses of mg of whole milk powder samples were transferred to the quartz vessels. Digestion efficiency using nitric acid solutions (6 mL) was evaluated in the following concentrations: 1, 2, 3, 7, and 14 mol L − 1. After closing and capping the rotor, vessels were pressurized with5, and 20 Cited by:   By Tamer M.

Alslaibi Currently, approximatelytons of activated carbon (AC) is annually consumed worldwide. Although, AC is widely used as adsorbent in adsorption process, application. Microwave digestion is a common technique used by elemental scientists to dissolve heavy metals in the presence of organic molecules prior to analysis by inductively coupled plasma, atomic absorption, or atomic emission measurements.

This technique is usually accomplished by exposing a sample to a strong acid in a closed vessel and raising the pressure and. Microwave heating principles [2] where Pav is the average power, ω the frequency of radiation, εo the permittivity of free space, E the electric field strength and E* the conjugate of the electric field equation shows that greater electric field strengths are required at lower frequencies to obtain the same powerFile Size: KB.

of your analysis. Great results begin with good preparation and our Titan MPS Microwave Sample Preparation System delivers the clean, clear solutions you need for reliable results. The Titan MPS is ideal for difficult environmental and common industrial applications while also providing high performance for a wide range of digestion needs.

Microwave digestion is a convenient and timesaving closed-vessel method compared to the traditional approach of open beakers on hot plates. Samples are digested for metals analysis in sealed TFE-lined bombs placed in a microwave oven.

EPA methods: Method - Microwave assisted acid digestion of aqueous samples and extracts. Milestone Srl 2 Closed Vessel Acid Digestion Microwave Sample Preparation for AA and ICP.

Milestone Srl 3 Microwave Instrumentation • Microwave oven • Microwave control system • Reaction monitoring and control Microwave-assisted acid digestion of siliceous and organically based Size: 1MB.

@article{osti_, title = {Use of microwave oven and nitric acid-hydrogen peroxide digestion to prepare botanical materials for elemental analysis by inductively coupled argon plasma emission spectroscopy}, author = {White, R.T.

and Douthit, G.E.}, abstractNote = {A sample preparation method has been developed that provides a nitric acid-hydrogen perioxide. A simple design for microwave assisted digestion vessel with low reagent consumption suitable for food and environmental samples. Sci. Rep. 6, ; doi: /srep ().Cited by: 2.

For a basic understanding of microwave acid digestion theory, including safety guidelines and dissolution methods for geological, metallurgical, botanical, biological, food and other samples, we recommend the ACS Professional Reference Book edited by H.M.

Kingston and Lois B. Jassie, titled: Introduction to Microwave Sample Preparation, File Size: KB. affect the digestion method. Successful digestion of a sample is a combination of chemistry, heating, and time.

Raising the temperature of the sample and reagents increases the rate of reaction and will shorten the digestion time. Use of appropriate reagents is critical. If Nitric Acid was not successful Hydrochloric, Hydrofluoric, andFile Size: KB. The purpose of this work was to investigate the effect of microwave irradiation on the regeneration of modified activated carbons (GAC/MW, GAC/Ni, and GAC/Cu).

The untreated activated carbon (GAC pure) was used for blank experiment. Microwave heating was used for preparation and regeneration of the modified activated carbons. The effect of loading Ni2+ and Cited by: 4. Microwave Assisted Acid Digestion of Sediments, Soils, and Tissues References: Method A, Test Methods for the Evaluation of Solid Wastes, (USEPA Office of Solid Waste and Emergency Response), SW, Method A, Rev.

1, Nov. Scope and ApplicationFile Size: KB. Microwave Assisted Acid Digestion of Biomorphic Ceramic Obtained from Beech Wood Infiltrated with Nickel Oxide: Factorial Design TiO 2 by infiltrating wood with titanium tetraisopropoxide sol.

A titania gel formed as a result of hydrolysis of the sol; subsequent calcination in air yielded TiO 2 ceramic retaining the original wood morphology. 4 decomposition over an activated carbon, acting as catalyst and microwave receptor, using a combination of CH 4/N 2. The same method was also used to grow carbon nanofilaments on carbon fibers doped with Fe and Ni [23], giving rise to structures similar to those shown in Figure 2.

Mixtures of CH 4/CO 2 were. The experiments were carried out using a microwave oven Millestone (Ethos Plus) suitable for sample digestion. The device frequency used was GHz, cm wavelength and W power supply.

Figure 3 illustrates a simplified scheme of the microwave oven chamber (adapted from Walter et al., ).Cited by: 3. The microwave digestion system used for sample preparation was a Milestone MLS MEGA. The power range of the microwave oven may be set in 10 W increments up to a maximum of W.

The system is equipped with an microwave digestion rotor (MDR /6//) containing six high pressure digestion vessels (each one capacity of File Size: KB. Microwave acid digestion of solid samples combined with inductively coupled plasma – mass spectrometry (ICP-MS) provides a viable approach to quantification of heavy metals within landfill waste.

The efficiency of Aqua regia and HNO3 in microwave digestion of both closed and active landfill composites was compared, with a view to relating Author: A. O. Adelopo, P. I. Haris, B. Alo, Katherine Huddersman, R. O. Jenkins.A domestic microwave oven operating at GHz was modified, Fig. 4 and Fig. 5, so that a conveyer belt could be used to continously feed wet coal into the oven and dried coal collected at the other end.

The whole apparatus was shielded with a microwave by: 1. Deposition of titanium dioxide (TiO 2) on activated carbon (AC) surface has been widely utilized for the production of TiO 2 /AC photocatalyst, which can be used in photo-degradation of pollutants.

In this work, a fast and simple digestion procedure has been developed for the spectrophotometric quantitative analysis of TiO 2 in TiO 2 /AC photocatalyst. .