A new procedure, based on combustion to sulphate and ion chromatography for the analysis of elemental sulphur in sediments

Fabbri, Daniele; Locatelli, Clinio; Tarabusi, Simone

doi:10.1007/bf02491557

Cited by 11 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…23 The measurement of S 0 was accomplished using a procedure detailed elsewhere. 24 Briefly, 1 g of wet sediment was mixed with MgO and extracted three times with deoxygenated toluene (3 mL) by sonication (20 min) in a closed centrifuge tube. Aeration was minimized to avoid the oxidation of sulfur species.…”

Section: Discussionmentioning

confidence: 99%

Sulfur speciation in mercury-contaminated sediments of a coastal lagoon: the role of elemental sulfur

Fabbri

Locatelli

Snape

et al. 2001

J. Environ. Monitor.

View full text Add to dashboard Cite

Chemical equilibrium studies have predicted that elemental sulfur (S0) could play a crucial role in mercury mobility in salt marsh sediments. This prompted us to consider the occurrence of S0 in conjunction with the degree of contamination in sediments of a coastal wetland (Pialassa Baiona, Italy) impacted by inputs of mercury derived from past industrial activity. The distribution of S0, total Hg, soluble sulfates and acid-soluble sulfides was studied in five sediment cores collected in two ponds of the lagoon. Sulfides, sulfates and S0 exhibited vertical profiles typical of salt marsh systems, with concentrations declining with depth. Mercury enrichment (2-23 mg kg-1) was detected at the surface strata where the highest concentrations of sulfides and S0 were found (up to 1.70 and 0.9 g kg-1, respectively). The effect of elevated levels of sulfides and elemental sulfur on the fate of mercury in the lagoon is discussed.

show abstract

Section: Discussionmentioning

confidence: 99%

Sulfur speciation in mercury-contaminated sediments of a coastal lagoon: the role of elemental sulfur

Fabbri

Locatelli

Snape

et al. 2001

J. Environ. Monitor.

View full text Add to dashboard Cite

show abstract

“…Based on the AOAC methods ( 19 ), the dry matter, protein, fat, ash and carbohydrates were determined by difference from the proximate analysis, for each of the analysed treatments, and the caloric intake was determined according to the Berthelot-Malher bomb calorimeter method cited by Fabbri et al . ( 20 ) using Parr 6300 oxygen bomb calorimeter (Parr Instrument Company, Moline IL, USA). All analyses were done in triplicate.…”

Section: Methodsmentioning

confidence: 99%

Effect of Adding Guava (Psidium guajava) Epicarp Extract Flour on the Physicochemical, Textural, Colour and Sensory Properties of Frankfurters

Velasco-Arango

Zapata

Ordóñez‐Santos

2021

Food Technol. Biotechnol. (Online)

View full text Add to dashboard Cite

Research background. The industrial transformation of tropical fruits, and in particular guava, generates a large quantity of by-products that are generally disposed of as organic waste. In said by-products a large quantity of bioactive substances is concentrated, such as carotenoids, which can be used for the partial substitution of nitrites in meat sausages without affecting their physicochemical, color and conservations characteristics. Although there are some studies in this regard, not carried out with guava residues, there is still a lack of research to verify this hypothesis. Therefore, the aim of this study was to investigate the action of the components of the guava epicarp extract on frankfurters. Experimental approach. Three treatments were proposed (25 %, 50 % and 75 % replacement of guava epicarp flour extract), along with a control treatment without said extract. The physicochemical properties, color coordinates, and texture parameters were analyzed, and a sensory evaluation was also carried out. The treatment that presented the best results was subjected to a stability analysis over 30 days. Results and conclusions. The treatment with the 25 % of guava epicarp flour extract addition showed the best results, which did not affect the coloration of the sausages or the physicochemical and textural properties. Likewise, during the stability analysis over time, the parameters related to fat oxidation were not affected, and the final products obtained a final residual nitrite load of (23.65±0.16) mg/kg, lower than the maximum allowed (150 mg/kg). Novelty and scientific contribution. The partial substitution of the nitrites in Frankfurt sausages by the carotenoids obtained from the guava epicarp, in a concentration not exceeding 25 %, is shown as viable alternative for the reduction of said nitrites, which does not affect the coloration or their useful life times. The above can be seen as a new alternative for the reduction of nitrites in the meat industry, which favors its development as it is a substance of natural origin.

show abstract

“…The sulfuric acid was reduced to SO 2 and finally quantified by microcoulometric titration (Wardenicki 1991). Zero-valent sulfur (S°) was quantified in sediments by combustion of the respective toluene extracts and ion chromatography of the emerging sulfate (Fabbri et al 2001). Direct ICP-OES was recommended for the determination of total dissolved sulfur in aqueous extracts of forest soils containing more than 1 mg sulfur per liter (Prietzel et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Determination of volatile organic sulfur compounds in contaminated groundwater

2008

View full text Add to dashboard Cite

A practical method for the quantification of total purgeable organic sulfur (POS) in highly contaminated groundwater is described. Volatile organic sulfur compounds (VOSC) are purged from the water samples by a stream of oxygen and combusted. The emerging sulfur dioxide is absorbed in H 2 O 2 and converted to sulfate which is quantified by ion chromatography and reported as mass sulfur equivalent. The overall limit of quantification is 0.03 mg l -1 . The content of POS is balanced with the total VOSC determined by GC-AED after liquid-liquid extraction. Separate determination of the non-volatile organic sulfur compounds by direct combustion of the water sample and adsorption to charcoal yielded a mass balance of the total sulfur content. Semi-quantitative GC-MS after purge & trap accumulation revealed that the VOSC mixture is composed of C 1 -C 4 alkyl sulfides. The implementation of the developed methodology for the quantification of VOSC as potential catalyst poison in a cleaning plant for groundwater contaminated with volatile haloorganics (VOX) is presented.

show abstract

A new procedure, based on combustion to sulphate and ion chromatography for the analysis of elemental sulphur in sediments

Cited by 11 publications

References 13 publications

Sulfur speciation in mercury-contaminated sediments of a coastal lagoon: the role of elemental sulfur

Sulfur speciation in mercury-contaminated sediments of a coastal lagoon: the role of elemental sulfur

Effect of Adding Guava (Psidium guajava) Epicarp Extract Flour on the Physicochemical, Textural, Colour and Sensory Properties of Frankfurters

Determination of volatile organic sulfur compounds in contaminated groundwater

Contact Info

Product

Resources

About