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Friday, July 17, 2020 | History

3 edition of wet ashing of organic matter employing hot concentrated perchloric acid. found in the catalog.

wet ashing of organic matter employing hot concentrated perchloric acid.

G. Frederick Smith

wet ashing of organic matter employing hot concentrated perchloric acid.

The liquid fire reaction.

by G. Frederick Smith

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  • 20 Currently reading

Published by G. Frederick Smith Chemical Co. in Columbus, Ohio .
Written in English

    Subjects:
  • Perchloric acid,
  • Chemical tests and reagents,
  • Chemistry, Analytic

  • Edition Notes

    Other titlesThe liquid fire reaction.
    The Physical Object
    Pagination397-421 p.
    Number of Pages421
    ID Numbers
    Open LibraryOL13541260M
    OCLC/WorldCa7720497

    A study of mole drainage with simplified cultivation for autumn-sown crops on a clay soil - Volume Issue 3 - F. B. Ellis, D. G. Christian, P. L. Bragg, F. K. G. Smith, G. F., ^, Mixed perchloric and sulfuric acids. I. Simultaneous oxidizing and reducing properties of hot concentrated perchloric acid; Indus, and Eng. Chemistry, Anal. Ed., v. 6, p. * _____, t The wet ashing of organic matter employing hot concentrated perchloric acid. The liquid fire reactions Analytica Chimica Acta.

    In this procedure, the wet fish sample was weighed before and after vacuum freeze drying, and then transferred to a low-temperature asher to remove organic matter The residue was then digested in 0 5 mol L−1 hydrochloric acid% hydrogen peroxide, ascorbic acid being added to destroy residual hydrogen peroxide, and copper is extracted from. Digestion can be done with concentrated nitric acid or with v/v mixture of nitric acid and perchloric acid. Warm the matter with such acid for several hours under fume hood and then cool and.

    Smith, G. F. The wet ashing of organic matter employing hot concentrated perchloric acid. The liquid fire reaction. Anal. Chim. Acta8, – Google Scholar. Trought, M. C. T. and Drew, M. C. The development of waterlogging damage in wheat seedlings (Triticum aestivum L.). I. Shoot and root growth in relation to changes in the. over the sample during heating to assist in combustion. These losses are minimized by ashing samples at as low a temperature as possible, gradually increasing and decreasing the temperature during the ashing process, using a slow gas-flow rate, and never opening the door of a hot .


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Wet ashing of organic matter employing hot concentrated perchloric acid by G. Frederick Smith Download PDF EPUB FB2

The wet ashing of organic matter employing hot concentrated perchloric acid: The liquid fire reaction. VOL. 8 () ANALYTICA CHIMICA ACTA THE WET ASHING OF ORGANIC MATTER EMPLOYING HOT CONCENTRATED PERCHLORIC ACID THE LIQUID FIRE REACTION by G.

FREDERICK SMITH The N'oyes Chemical Laboratory of the Uiiivrrsi/y of f If mois, Urbann, by: The Liquid Fire Reaction: the Wet Ashing of Organic Matter Employing Hot Concentrated Perchloric Acid; [G. Frederick; Smith] on *FREE* shipping on qualifying : G.

Frederick; Smith. The Wet Ashing of Organic Matter Employing Hot Concentrated Perchloric Acid The Liquid Fire Reaction Smith, G.

Frederick Published by The G. Frederick Smith Chemical Company. Smith GF () The wet ashing of organic matter employing hot concentrated perchloric acid. The liquid fire reaction. Anal Chim Acta 8: – This reference gives an in-depth review of wet ashing with perchloric acid.

Tables on reaction times with foodstuffs and color reactions are informative and easy for the food scientist to understand. Smith GF () The wet ashing of organic matter employing hot concentrated perchloric acid. The liquid fire reaction.

Anal Chim Acta – The treatise gives an in-depth review of wet ashing with perchloric acid. Tables on reaction times with foodstuffs and color reactions are informative.

Pergamon Press Ltd. Printed in Northern Ireland WET OXIDATION OF ORGANIC MATTER EMPLOYING MIXED PERCHLORIC AND SULPHURIC ACIDS AT CONTROLLED TEMPERATURES AND GRADED HIGH POTENTIALS HARVEY DIEHL and G. FREDERICK SMITH Iowa State College, Ames, Iowa and The Noyes Laboratory, University of Illinois, Urbana, U.S.A.

(Received 11 October ) Summary The oxidation potential of perchloric acid. The wet ashing of organic matter employing hot concentrated perchloric acid. The liquid fire reaction This reference gives an in-depth review of wet ashing with perchloric acid.

from book Food Analysis The wet ashing of organic matter employing hot concentrated perchloric acid The liquid fire reaction. (diluted and concentrated nitric acid or water) on the. In wet digestions with perchloric acid, treat the sample first with nitric acid to destroy easily oxidizable matter.

Do not distill perchloric acid in a vacuum, because the unstable anhydride may be formed and cause a spontaneous explosion. Protect vacuum sources from perchloric acid. Perchloric acid becomes a strong oxidizer when heated or at higher concentrations, at or above 73%. Organic, metallic and non-organic salts formed from oxidation are shock sensitive and pose a great fire and explosion hazard.

There are many documented accidents resulting from perchloric acid. The wet ashing of organic matter employing hot concentrated perchloric acid. Analytica Chimica Acta8, DOI: /S(00) decomposition of organic matter. Hot and concentrated.

HNO. 3 Hot and concentrated perchloric acid has powerful oxidizing. Dry ashing techniques are especially suitable for samples with.

Ash is the inorganic residue from the incineration of organic matter. The amount and composition of ash in a food product depend on the nature of the food ignited and on the method of ashing. The amount and composition of ash in a food product depend on the nature of the food ignited and on the method of ashing.

[20] Smith, G. F., “T he wet ashing of organic matte r employing hot conce ntrated perchloric acid. The liquid f ire reaction”., Analy tica Chimica Acta, 8, ().

Dry ashing is an alternative means of sample preparation and is accomplished by heating the sample in an open dish or crucible in air. Very often this is done in a muffle furnace located in a clean room. The stages of dry ashing include: sample drying, evaporation of volatile materials, and progressive oxidation of the non-volatile residue until all of the organic matter is destroyed.

The method developed in our laboratory involves the use of % perchloric acid, which is a very useful oxidizing agent for wet ashing which when used with various temporizing or damping agents such as concentrated nitric acid, metallic vanadium, potassium dichromate, or acetic acid, is very effective in completely destroying most organic com- pounds and, under suitable reflux conditions, oxidizing the sulfur quanti- tatively to sulfuric acid.

A Review of Synthesis of Organic Compounds Containing the Ferroin Group by Francis H. Case The Wet Ashing of Organic Matter Employing Hot Concentrated Perchloric Acid; The Liquid Fire Reaction by G. Frederick Smith, Ph. Perchloric acid is not explosive in solution, only extremely corrosive and harmful to breathe.

This is justification for the use of a chemical fume hood. If the acid is evacuated in the same ventilation equipment that captures organics, the salt residue of the perchloric acid is saturated by the organics, and a new molecular structure is formed.

SMITH G. () The wet ashing of organic matter employing hot concentrated perchloric acid. The liquid fire reaction: Analyt. perchloric acid method requires less manipulation than proce-dures based on fusion of the ash.

However care must be taken because of potential hazards in the use of perchloric acid. The perchloric acid method also tends to give low results. SigniÞcance and Use The procedure described is speciÞc for chromium in wet blue. Dry ashing, wet ashing and microwave digestion procedures are commonly used for sample preparation Dry ashing digestion procedures use a high temperature muffle furnace capable of maintaining temperatures of between and °C to removal the organic matrix in samples, then the residues are dissolved with appropriate solvent.

If the wet digestion utilizes perchloric acid, all work needs to be carried out in an expensive special fume hood called a perchloric acid hood. Procedure for wet ashing.

Accurately weigh a dried, ground 1-g sample in a ml Erlenmeyer flask (previously acid washed and dried).The ash content is determined from the loss of weight, which occurs from complete oxidation of sample.

Wet Ashing. Wet ashing is usually used for the elemental analysis. Wet ashing commonly employs concentrated nitric acid and perchloric acid or nitric acid and sulphuric acid to oxidize the organic matter of the food sample.