Determination of mercury residues in potatoes, grain and animal tissues using perchloric acid digestion

Smart, N. A.; Hill, Alan R.

doi:10.1039/an9699400143

Cited by 14 publications

(4 citation statements)

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“…The colorimetric solvent extractive method [9][10][11] employing orange complex of dithizone is still a valuable method for analyzing mercury(II). However, this method [9][10][11] is lengthy and time consuming, require large amounts of reagents, is pH dependent and it lacks selectivity due to much interferences [12,13] (e.g., Pt(IV), Pd(II), Au(III), Ag(I), Cu(II), Pb(II), Cd(II), etc.). The method described here records for the first time the non-extractive direct spectrophotometric determination of mercury(II) in aqueous media without recourse of any "clean-up" step.…”

Section: Introductionmentioning

confidence: 99%

A rapid spectrophotometric method for the determination of mercury in environmental, biological, soil and plant samples using diphenylthiocarbazone

Ahmed

Alam

2003

Spectroscopy

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A simple, sensitive and highly selective direct spectrophotometric method for the determination of trace levels of mercury(II) in various samples is described. Diphenylthiocarbazone (dithizone) reacts in slightly acidic 50% aqueous 1,4-dioxane media (0.18–1.80 M sulphuric acid) with mercury(II) to give an orange chelate which has an absorption maximum at 488 nm. The average molar absorption co-efficient and Sandell's sensitivity were found to be 2.5×104l mol−1 cm−1and 0.015 μg of Hg(II) cm−2, respectively. The reaction is immediate and absorbance remains stable for over 24 h. Beer's law is obeyed for concentration range of mercury(II) between 0.1 μg ml−1and 25 μg ml−1; the stoichiometric composition of the chelate is 1 :2 (mercury : dithizone). The various analytical parameters, such as effect of time, acidity, reagent concentration and foreign species, were studied. The method was applied successfully to a number of environmental waters (portable and polluted), biological samples (human blood, urine and fish), soils, plant samples (potato, cabbage, lettuce, carrot and tomato), solutions containing both mercury(I) and mercury(II) and complex synthetic mixtures. The method is very simple and requires no solvent extraction or pre-concentration steps.

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Section: Introductionmentioning

confidence: 99%

A rapid spectrophotometric method for the determination of mercury in environmental, biological, soil and plant samples using diphenylthiocarbazone

Ahmed

Alam

2003

Spectroscopy

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“…Smart and Hill (356) reported the determination of mercury residues in potatoes, grain, and animal tissues using perchloric acid digestion. Recovery of added organomercurial is about 90%.…”

Section: Miscellaneous Pesticides and Miscellanymentioning

confidence: 99%

Pesticide residues

Thornburg¹

1971

Anal. Chem.

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“…The application of nephelometry to obtain horizontal and vertical profiles is growing (IS, 280); new instrument designs increase stability (173, 471), and measurements of wavelength dependence ( 14) have shown the brown haze in urban air to be dominated by particles and not by N02 (95). The effects of relative humidity remain to be sorted out (325).…”

Section: Suspended Particulate Mattermentioning

confidence: 99%

Air pollution

Mueller¹,

Kothny²,

Pierce³

et al. 1971

Anal. Chem.

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paper was prepared to provide an overview of analytical activities concerning air pollution in the years of 1969 and 1970. It avoids overlapping the previous analogous review [Altshuller, A. P., Anal. Chem., 41, 1R, (1969)]. As a practical matter, most of the papers included were dated in the period June 1968 to August 1970. In most cases we had to rely on abstracts. Papers readily available to us but published after August 1970 were also included.A review such as this, is intended primarily to collate and to provide perspective on what has been published. We have found previous reviews useful not only at the time of publication but also years afterward. A review largely restricted to the information published cannot be relied upon to include the more recent advances in a rapidly progressing field.

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Determination of mercury residues in potatoes, grain and animal tissues using perchloric acid digestion

Cited by 14 publications

References 0 publications

A rapid spectrophotometric method for the determination of mercury in environmental, biological, soil and plant samples using diphenylthiocarbazone

A rapid spectrophotometric method for the determination of mercury in environmental, biological, soil and plant samples using diphenylthiocarbazone

Pesticide residues

Air pollution

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