A comparative evaluation of wet digestion and dry ashing methods for the determination of some major and minor nutrients in composted manure

2005 ◽  
Vol 87 (2) ◽  
pp. 147-158 ◽  
Author(s):  
A. Egrinya Eneji ◽  
S. Yamamoto ◽  
G. Wen ◽  
S. Inanaga ◽  
T. Honna
Keyword(s):  
Comparative Evaluation ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Minor Nutrients

Adaptation of a Dry Ashing Procedure for Determination of Selenium by Fluorimetry in High-Fat Foods

1995 ◽  
Vol 78 (2) ◽  
pp. 477-479 ◽  
Author(s):  
Jacques R Bellanger
Keyword(s):  
Magnesium Nitrate ◽  
High Fat ◽  
Fluorimetric Determination ◽  
Digestion Method ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Selenium Determination ◽  
Wet Ashing ◽  
Total Procedure

Abstract The wet ashing–dry ashing procedure for destruction of organic matter in high-fat foods for subsequent fluorimetric determination of selenium was investigated. Samples were decomposed by predigestion with nitric acid and dry-ashed with magnesium nitrate and hydrochloric acid. Selenium was recovered quantitatively through the total procedure. Detection limit was about 4 ppb. Accuracy was tested by analysis of several reference materials and by comparison with the wet-digestion method. The present method can be used conveniently for selenium determination in high-fat foods.

Comparative Research of Two Pretreatment Methods on Determination of Trace Manganese in Panax Pseudo-Ginseng Var. Notoginseng by Atomic Absorption Spectroscopy

2012 ◽  
Vol 554-556 ◽  
pp. 2064-2067
Author(s):  
Jin Yang ◽  
Wei Liu ◽  
Bao Sheng Wang ◽  
Qing Hua Li ◽  
Ping Yi ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Recovery Rate ◽  
Comparative Research ◽  
Manganese Content ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Better Than

In this research the atomic absorption spectroscopy method (the correlation coefficient was 0.9995) was employed for determination of the content of heavy metal-manganese in panax pseudo-ginseng var. notoginseng, which was chosen as the sample. The optimum conditions of two pretreatments were researched independently. In the dry ashing, the optimized temperature and time are 600°C and 4~6 hours respectively, and the manganese content determined is 53.16 ug/g and the recovery rate of manganese added in sample is 98.64%. In the wet digestion, The HNO3-H2O2 digestion system is the best one, and the content was 52.95ug/g and the recovery rate is 97.30%. So the two pretreatment methods of the sample are accurate enough on manganese content determination. But the dry ashing is better than the wet digestion relatively.

Minerals in Feeds by Atomic Absorption Spectrophotometry

1967 ◽  
Vol 50 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Mary Heckman
Keyword(s):  
Sample Preparation ◽  
Atomic Absorption ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Mineral Mixture ◽  
Calcium Magnesium ◽  
Calcium And Magnesium

Abstract Seventeen laboratories collaborated in the study of analysis of feeds for calcium, magnesium, zinc, manganese, iron, and copper by atomic absorption spectrophotometry. Six feeds and one mineral mixture were analyzed; both dry ashing and wet digestion were used to prepare samples. Three feeds were in the form of solutions to eliminate sample preparation as a variable. Strontium and lanthanum were added to the feed to eliminate phosphorus interference and results were compared. Results indicate that the method is suitable for calcium and magnesium. Further work is needed on the determination of zinc, manganese, iron, and copper.

Collaborative Study of Minerals in Feeds by Atomic Absorption Spectrophotometry

1968 ◽  
Vol 51 (4) ◽  
pp. 776-779 ◽  
Author(s):  
Mary Heckman
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
Atomic Absorption Spectrophotometry ◽  
Absorption Spectrophotometry ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Mineral Mixture ◽  
Determination Of Copper ◽  
Feed Samples

Abstract Eleven laboratories collaboratively studied the analysis of feeds for zinc, manganese, iron, and copper by atomic absorption spectrophotometry. Five feeds and one mineral mixture were analyzed. The feed samples were prepared by both dry ashing and wet digestion. Samples were analyzed chemically for manganese and iron. Results indicate the method is suitable for zinc, manganese, and iron. Further work is needed on the determination of copper. The method for atomic absorption analysis of feeds for calcium and magnesium (recommended too late for action in 1966) and the method for zinc, manganese, and iron are recommended for adoption as official, first action.

scholarly journals Arsenic Determination in Certifiable Color Additives by Dry Ashing Followed by Hydride Generation Atomic Absorption Spectrometry

1999 ◽  
Vol 82 (2) ◽  
pp. 327-330 ◽  
Author(s):  
Nancy M Hepp
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Hydride Generation ◽  
Absorption Spectrometry ◽  
Injection System ◽  
Wet Digestion ◽  
Dry Ashing ◽  
Flow Injection System ◽  
Arsenic Determination

Abstract The preparations of digested samples of certifiable color additives by dry ashing and wet digestion for arsenic analysis by hydride generation atomic absorption spectrometry (AAS) were compared. The dry ashing technique was based on the preparation used in ASTM D4606-86 for determination of As and Se in coal. The acid digestion method used nitric and sulfuric acids heated by microwaves in sealed vessels. The digested color additives were analyzed for As by using hydride generated from sodium borohydride mixed with the acidified solution on a flow injection system leading to an atomic absorption spectrometer. Dry ashing was preferable to wet digestion because wet digestion yielded poor recoveries of added As. Dry ashing followed by hydride generation AAS gave determination limits of 0.5 ppm As in the color additives. At a specification level of 3 ppm As, the precision of the method using dry ashing was ± 0.4 ppm (95% confidence interval).

Determination of Organic Iodine Compounds in Serum

1968 ◽  
Vol 14 (4) ◽  
pp. 339-347 ◽  
Author(s):  
Vincent J Pileggi ◽  
Gerald Kessler
Keyword(s):  
Acetic Acid ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Direct Determination ◽  
Wet Digestion ◽  
Organic Iodine ◽  
Iodine Compounds ◽  
Dry Ashing ◽  
Dowex 1

Abstract Unidentified substances in acetic acid column eluates, obtained in the determination of serum thyroxine by column chromatography with the anion-exchange resin Dowex-1, prevented the direct determination of thyroxine by interference with the iodidecatalyzed ceric-arsenite reaction. Pretreatment of the eluates with Br2 or Cl2 eliminated the interference and permitted the direct assay of thyroxine by the ceric-arsenite system without incineration or wet digestion. Pretreatment with Br2 or Cl2 also significantly enhanced the catalytic activity of thyroxine, rendering its iodine nearly equivalent to inorganic iodide in the ceric-arsenite system. This nonincineration thyroxine assay is significantly more specific than methods that employ wet or dry ashing, because many organic iodine compounds used in diagnosis and therapy are not measured. A comparison of the nonincineration technic with the alkaline dry-ash method on 110 random serums revealed a mean difference of 0.13 µg./100 ml. (X = 4.5 µg./ 100 ml.), with the nonincineration technic yielding the higher result. This difference was found to be statistically significant (p< 0.001).

DETERMINATION OF TRACE ELEMENTS IN SOME BRANDS OF GREEN TEA USING WET DIGESTION, INFUSION AND DRY ASHING METHODS

2021 ◽  
Vol 4 (4) ◽  
pp. 520-525
Author(s):  
Ibrahim Imrana ◽  
Salisu Aminu ◽  
Umar Bilal ◽  
Bello Sada Mujitafa
Keyword(s):  
Trace Elements ◽  
Green Tea ◽  
Soil Conditions ◽  
Acid Digestion ◽  
Wet Digestion ◽  
Contributory Factors ◽  
Water Infusion ◽  
Dry Ashing ◽  
Almost All

The concentrations of trace elements (Cu, Zn, Fe, Mn and Ni) in some commercially available brands of green tea sold within Katsina metropolis coded (SGT, HGT, LGT, AGT and GGT) were determined using wet acid digestion, water infusion, and Dry Ashing methods by Atomic Absorption Spectroscopy (AAS).  Among the trace elements analyzed Nickel and Manganese recorded the highest value ranged 1.0 – 3.5 mg kg-1 and1.0 – 5.5 mg kg-1 in dry ashing and wet digestion respectively. Fortunately, almost all the elements analyzed were within the standard permissible limit of WHO. The content of trace elements was found highest in the Dry Ashing method and lowest values recorded in tea infusion. The contributory factors responsible for the differences found in tea samples could be from a varying concentration of metals in the soil, conditions of cultivation and preparations, and these vary between both countries of origin and for the type of tea. Further work is recommended on these brands to study other important parameters

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