Speciation Analysis of Arsenic in Traditional Chinese Medicines by Hydride Generation-Atomic Fluorescence Spectrometry

Yang, Lili; Gao, Lian; Zhang, Deqiang

doi:10.2116/analsci.19.897

Cited by 17 publications

(11 citation statements)

References 35 publications

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“…The reductant is 10 g L )1 KBH 4 and the carrier acid solution used was 1.0 M HCl. For total arsenic determination, the same procedure as described above was carried out after adding 2 mL of 10 g L )1 thiourea solution and 1.7 mL concentrated HCl (Yang et al, 2003). The concentrations of arsenate were calculated by subtracting arsenite concentrations from total arsenic concentrations.…”

Section: Experiments Ii: Measurement Of Changes In Arsenic Speciation mentioning

confidence: 99%

Effects of Iron and Manganese Plaques on Arsenic Uptake by Rice Seedlings (Oryza sativa L.) Grown in Solution Culture Supplied with Arsenate and Arsenite

2005

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We have shown previously that phosphorus nutrition and iron plaque on the surface of rice roots influence arsenate uptake and translocation by rice in hydroponic culture. We have now investigated the role of iron (Fe) and manganese (Mn) plaque on arsenate and arsenite uptake and translocation in rice seedlings grown hydroponically. Fe and Mn plaques were clearly visible as reddish or brown coatings on the root surface after 12 h induction, and Fe plaque was much more apparent than Mn plaque. Arsenite or arsenate supply did not decrease plant dry weights significantly. There were significant differences in shoot dry weights but little difference in root dry weights between some plaque treatments. Arsenic (As) concentrations in Fe plaque when arsenate was supplied were significantly higher than those in no plaque (control) and Mn plaque treatments, and much higher than those supplied with arsenite. This showed that Fe plaque on the rice root had higher affinity to arsenate than to arsenite. In Fe plaque treatment, the results indicated that most As was sequestered in roots when arsenite was supplied and most As concentrated in Fe plaque when arsenate was supplied. Most As was accumulated in rice roots in Mn plaque and no plaque treatments for both As species.

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Section: Experiments Ii: Measurement Of Changes In Arsenic Speciation mentioning

confidence: 99%

Effects of Iron and Manganese Plaques on Arsenic Uptake by Rice Seedlings (Oryza sativa L.) Grown in Solution Culture Supplied with Arsenate and Arsenite

2005

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“…Various types of pre-reducing agents had been used to reduce As(V) to be As(III) including KI 18 , KBr, thiourea 18 , ascorbic acid, KI plus ascorbic acid 19,20 , and KI plus thiourea 21 solutions. The concentration of the pre-reducing agent was investigated in the range 0.5-10% (w/v) (Fig.…”

Section: Effect Of Pre-reduction Agent On As(v) To Be As(iii)mentioning

confidence: 99%

Determination of arsenic in chilli and tomato grown in North East Thailand

Thaharn¹,

Techawongstien²,

Chanthai

2014

ScienceAsia

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Heavy metals in edible fruits constitute a health hazard. We present an analytical procedure for determining inorganic arsenic (As) species in hot chilli pepper and tomato fruits at the red-ripe stage using microwave assisted digestion (MAD) followed by flow injection-hydride generation atomic absorption spectrometry (FI-HGAAS). The optimum conditions for the acid digestion method and arsenic hydride (AsH 3 ) determination were studied in detail. The plant sample (0.5 g) was digested with 5 ml of concentrated nitric acid by MAD programmed at 900 W for 35 min. Arsenite, As(III), in the acid digests could only be analysed by FI-HGAAS using 1% (v/v) HCl as a carrier solution and 0.5% (w/v) NaBH 4 in 0.04% (w/v) NaOH as a reducing agent, while total As content was determined after pre-reduction of arsenate, As(V), to As(III) with 2% (w/v) thiourea prior to measurement. The concentration of As(V) was then calculated as the difference between total As and As(III). Detection limits for As(III) and As(V) were 0.004 and 0.006 µg/l, respectively. The relative standard deviation of the data was less than 5% (n = 10). The recovery of the samples spiked with 10 µg/l As was 98-103%. The proposed method was applied to determine traces of As in six varieties of hot chilli pepper (0.55-0.88 µg/g As(III) and 0.22-0.93 µg/g As(V)) and seven varieties of tomato (0.36-0.64 µg/g As(III) and 0.22-0.60 µg/g As(V)) samples.

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“…As will be demonstrated, relief of dyspnoea has been a regular feature of reports on oral arsenic medication. Papers in English have recently been published describing assay methods (Ong et al , 1999; Yang et al , 2003) as well as toxicity. For example, Chinese Medicine Balls have been found to contain both arsenic and mercury in amounts of each element sufficient to cause toxic effects (Espinoza et al , 1995).…”

Section: Arsenic Since Ancient Timesmentioning

confidence: 99%

Notoriety to respectability: a short history of arsenic prior to its present day use in haematology

Doyle¹

2009

Br J Haematol

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Summary This paper looks at arsenic, and in particular the trioxide, from the days of the ancient Chinese, Egyptians, Greeks and Romans, through the 17th–20th centuries to its adoption by today’s haematologists. It looks at its commercial and medical uses, past and present, its notoriety as a poison, it’s reputation as a ‘tonic’ and therapeutic agent, many of the famous people associated with it including Thomas Fowler, William Withering and Robert Christison, and the promise an 18th century panacea now offers 21st century patients under the care of today’s haematologists and tomorrow’s oncologists.

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Speciation Analysis of Arsenic in Traditional Chinese Medicines by Hydride Generation-Atomic Fluorescence Spectrometry

Cited by 17 publications

References 35 publications

Effects of Iron and Manganese Plaques on Arsenic Uptake by Rice Seedlings (Oryza sativa L.) Grown in Solution Culture Supplied with Arsenate and Arsenite

Effects of Iron and Manganese Plaques on Arsenic Uptake by Rice Seedlings (Oryza sativa L.) Grown in Solution Culture Supplied with Arsenate and Arsenite

Determination of arsenic in chilli and tomato grown in North East Thailand

Notoriety to respectability: a short history of arsenic prior to its present day use in haematology

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