Determination of Arsenic in Petroleum Stocks and Catalysts by Evolution as Arsine

Liederman, David; Bowen, John E.; Milner, O. I.

doi:10.1021/ac60156a053

Cited by 23 publications

(4 citation statements)

References 11 publications

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“…Typical arsenic concentration in naphtha ranges from v1 to 40 mg L 21 . 2,[6][7][8][9][10][11][12][13] In 1959, Powers et al suggested arsenic would be present in naphtha as alkyl arsines. 2 Studies conducted by Puri and Irgolic in 1989 revealed that trimethylated and monomethylated arsenic are, in fact, the predominant arsenic species in petroleum products.…”

Section: Introductionmentioning

confidence: 99%

“…7 In the following years, other authors proposed different methodologies based on spectrophotometric determinations of arsenic as molybdenum blue or silver diethyldithiocarbamate complexes. 2,6,8,9 Those methods all have in common the laborious and time-consuming sample pretreatment step for matrix separation or analyte preconcentration, such as wet acid digestion, combustion, liquid-liquid extraction, distillation and arsine generation.…”

Section: Introductionmentioning

confidence: 99%

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Arsenic determination in naphtha by electrothermal atomic absorption spectrometry after preconcentration using multiple injections

Rebouças

Ferreira

Neto

2003

J. Anal. At. Spectrom.

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Naphtha is a petroleum fraction containing C4-C15 hydrocarbon compounds and is used as feedstock for petrochemical processes which are affected profoundly by trace amounts of arsenic. A simple method for arsenic determination in naphtha using electrothermal atomic absorption spectrometry with polarized Zeemaneffect background correction was developed. Multiple injections were used for direct preconcentration in the graphite tube, eliminating sample pretreatment. Doehlert experimental designs were used to find the best settings for the furnace program parameters. Modifier concentration, number of multiple injections and sample volume were also optimized with the same multivariate approach. With three 45 mL sample injections, ashing temperature 1200 uC, atomization temperature 2700 uC and ashing time 60 s, a detection limit of 0.5 mg L 21 and a characteristic mass of 61 pg were achieved, using 3000 mg L 21 Pd(NO 3 ) 2 as the chemical modifier. The relative signal standard deviation was found to be 9.0% at the 2.3 mg.L 21 level. Results from several naphtha test samples showed arsenic levels typically below 3.0 mg L 21 . The high degree of automation of the proposed method minimized technician sample handling allowing its application for routine analysis. This procedure has been used for arsenic determination in naphtha feeds processed in the Braskem Petrochemical (Salvador, Bahia, Brazil).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Arsenic determination in naphtha by electrothermal atomic absorption spectrometry after preconcentration using multiple injections

Rebouças

Ferreira

Neto

2003

J. Anal. At. Spectrom.

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“…Soil As was determined by extraction with concentrated HC1, ASH3 was generated on the extract by the Gutzeit proce dure, and then estimated by the silver diethyldithiocarbamate procedure (3).…”

Section: Methodsmentioning

confidence: 99%

“…Leaders in the apple industry recognize that high quality is of utmost importance to satisfy consumers and stimulate repeat sales (3). They urged the expansion of research to develop objective measurements of quality factors for use in grading and segregating fruit for storage or marketing.…”

Section: A D D Itio N a L Index W Ords M Alus Dom Estica Firm Ness Cr...mentioning

confidence: 99%

The Apple Replant Problem in Washington State1

Benson

Covey

Haglund

1978

J. Amer. Soc. Hort. Sci.

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The growth of apple seedlings (Malus domestica Brokh.) is negatively correlated with soil arsenic and zero growth occurs at about 450 ppm total arsenic. Soil arsenic concentrations less than 150 ppm, which are frequently found in orchard soils, contribute less to the replant problem than biological factors. Growth of apple trees was increased 50% or more by preplant soil fumigation with methyl bromide or trichloronitromethane (chloropicrin) in 87.5% of the trials in 17 apple orchard soils tested. Non-specific plant pathogens in orchard soils attack cereals as well as apple seedlings, but apple orchard soils also contain an entity that specifically affects apples. This is probably the same unknown entity that is responsible for specific apple replant disease in Europe, Australia, and elsewhere.

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Protein-Losing Enteropathy Associated With Arsenic Poisoning

Kobayashi¹

1971

Arch Pediatr Adolesc Med

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An 8-year-11-month-old girl had protei n\x=req-\ losing enteropathy associated with arsenic poisoning; to our knowledge, this is the first such case to be reported. A total dose of about 31 mg of arsenic trioxide was given orally during a two-month period for verrucae planae juveniles of the dorsal surface of the hands. About four weeks later edema, especially of the legs and eyelids, was noted. Jejunal biopsy with a Crosby's capsule revealed an abnormal dilated villus and mild atrophy of the submucosa. The treatment with dimercaprol resulted in improvement of both hypoproteinemia and edema.Edema and hypoproteinemia re¬ sulting from protein loss into the gastrointestinal tract has been de¬ scribed in patients with a wide varie¬ ty of gastrointestinal lesions, as well as in patients with such diseases as congestive heart failure, nephrosis, and dermatitis herpetiformis. Since reliable methods for quantification of protein loss into the gut have been described, more than 40 disorders have been shown to be potentially associated with an abnormally high leakage of protein into the gastroin¬ testinal tract. Therefore, the proteinlosing enteropathy is not a disease entity, but a syndrome with numer¬ ous underlying causes.

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Determination of Arsenic in Petroleum Stocks and Catalysts by Evolution as Arsine

Abstract: However, heating the bath formulation to 100" C. made a difference. No color developed a t 0.4 but a blue color appeared at the point of origin on the

Cited by 23 publications

References 11 publications

Arsenic determination in naphtha by electrothermal atomic absorption spectrometry after preconcentration using multiple injections

Arsenic determination in naphtha by electrothermal atomic absorption spectrometry after preconcentration using multiple injections

The Apple Replant Problem in Washington State1

Protein-Losing Enteropathy Associated With Arsenic Poisoning

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