Determination of fluoride in plant material using microwave induced  oxygen combustion

Šucman, E.; Bednář, J.

doi:10.17221/480/2011-cjfs

Cited by 8 publications

(4 citation statements)

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“…Hydrogen fluoride absorbed into the body has a half-life of 2–9 h in the blood [ 31 ], and approximately 60% is excreted into the urine within 24 h. Meanwhile, 99% of fluoride compounds not excreted are deposited in the bones as fluorapatite [ 32 ], which may lead to bone disease and fluorosis with long-term exposure [ 23 , 32 - 35 ]. In this study, urine fluoride measurements as a biological index of hydrogen fluoride accumulation in the body were attempted, but meaningful results could not be obtained, because the institution and equipment required for the test were unavailable during the early phase of the exposure.…”

Section: Discussionmentioning

confidence: 99%

Acute Symptoms after a Community Hydrogen Fluoride Spill

Woo

Yoon

et al. 2013

Ann of Occup and Environ Med

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ObjectivesThis study was conducted to describe the demographic characteristics, and clinical signs and symptoms of patients who visited a general hospital because of the release of chemically hazardous hydrogen fluoride that occurred on September 27, 2012 in Gumi City, Korea.MethodsThe medical records at 1 general hospital 9 km from the accident site were reviewed using a standardized survey format. There were 1,890 non-hospitalized and 12 hospitalized patients exposed to hydrogen fluoride between September 27 and October 13 2012.ResultsAmong the 12 hospitalized patients, 11 were discharged within 1 week and the other was hospitalized for 10 days. The chief complaints were respiratory symptoms such as hemoptysis and shortness of breath, gastrointestinal symptoms, neurologic symptoms, sore throat, and lip burn.The number of non-hospitalized patients exhibited a bimodal distribution, peaking on the first and twelfth days after the accident. Their chief complaints were sore throat (24.1%), headache (19.1%), cough (13.1%), and eye irritation (9.2%); some patients were asymptomatic (6.2%). Patients who visited the hospital within 3 days (early patients) of the spill more often had shortness of breath (27.0%) and nausea (6.3%) as the chief complaints than patients who visited after 3 days (late patients) (3.5% and 2.6%, respectively). However, cough and rhinorrhea were more common in the late patients (14.0% and 3.3%, respectively) than in the early patients (5.0% and 0.0%, respectively). Patients who were closer to the accident site more often had shortness of breath and sputum as the chief complaints than patients who were farther away. The mean serum calcium concentration was 9.37 mg/dL (range: 8.4–11.0 mg/dL); none of the patients had a decreased serum calcium level. Among 48 pulmonary function test results, 4 showed decreased lung function. None of the patients had abnormal urine fluoride levels on the eighth day after exposure.ConclusionsPatients hospitalized due to chemical hazard release of hydrogen fluoride had acute respiratory, gastrointestinal, and neurologic health problems. Non-hospitalized patients have acute symptoms mainly related to upper respiratory irritation.

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Section: Discussionmentioning

confidence: 99%

Acute Symptoms after a Community Hydrogen Fluoride Spill

Woo

Yoon

et al. 2013

Ann of Occup and Environ Med

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“…The fluorine concentration of young (20-30 years old) and old (70-80 years old) people in the bones on the dry matter are 200-800 mg kg -1 and 1000-2500 mg kg -1 , respectively. In the blood, fluorine is present predominately in its inorganic form and its average concentration ranges from 10 μg l -1 to 200 μg L -1 (Sucman and Bednar, 2012). Tea (Camellia sinensis) is widely consumed across the world owing to its healthy and biological effects.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fluoride Concentration and Daily Intake by Human from Tea Infusions

Atasoy¹,

Yeşilnacar²,

Atasoy³

2016

Harran Tarım Ve Gıda Bilimleri Dergisi

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The objectives of this study were to determine the fluoride content of tea and the percentage of the average daily intake of fluoride from tea extracts after 10 min brewing. The fluoride content in infusion of commercially available Turkish and Ceylon black, green teas were determined by ion selective electrode. The content of fluoride in tea infusion ranged from 1.010 to 2.89 mg L -1. The fluoride concentrations determined in Turkish black and green tea infusion were higher than in Ceylon black and green tea. The intake of fluoride will be in the range of 30.2-50.0% and 48.3-80.0% for adult and children-teenagers tea drinkers respectively, consuming ten glasses or five cups (1000 ml) of black tea per day. People are often exposed to multiple sources of fluoride, such as in food, water, air and excessive use of toothpaste. The control of tea quality is important to protect the human against to too high uptake of this element from black tea, which is the most popular beverage in Turkey. Excessive intake of fluoride with black tea, especially in the regions with its high level in the drinking water, increases the risk of dental fluorosis in children during the years of tooth development. Keywords: Tea infusion, Fluoride, Black tea, Green tea Demlenmiş Çayların Florür Miktarlarının ve Günlük Florür Alımının Belirlenmesi ÖzBu çalışmanın amacı Türk ve Seylan siyah ve yeşil çaylarının 10 dakika demlendikten sonraki Florür miktarlarını ve bu miktarların günlük flor ihtiyacını karşılama oranlarını ion selektif elektrot kullanarak belirlemektir. Demleme sonrası çayların florür miktarları 1.010 ile 2.89 mg L -1 arasında değişmiştir. Siyah ve yeşil Türk çaylarının florür miktarlarının Seylan çaylarından daha yüksek olduğu belirlenmiştir. Yetişkin ve çocuk bir birey günde 1000 ml siyah çay (10 bardak veya 5 fincan) tükettiğinde sırasıyla günlük florür ihtiyacının %30.2-50.0 ve %48.3-80.0'ini karşılayacaktır. İnsanlar gıda, su, hava ve diş macunları gibi farklı kaynaklardan florür almaktadırlar. Bu nedenle, özellikle sularında fazla miktarda florür bulunan bölgelerde, çocuklar gelişme dönemlerinde florisis riski ile karşı karşıyadır.

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“…Routine analysis of plants by inductively coupled plasma optical emission spectroscopy (ICP OES) usually requires a previous conversion of solid samples into solutions because the residual carbon content or suspended particles may cause analytical biases or even block the sample introduction system. 1,2 Regarding plant digestion for inorganic analysis, microwaveassisted sample preparation has become a standard, 3 providing several methods such as microwave-assisted wet digestion, 4 oxygen pressurized microwave-assisted digestion with diluted nitric acid, 5 focused microwave-assisted wet digestion, 6,7 microwave-induced combustion 8,9 and focused microwaveinduced combustion. 10 In spite of the high efficiency of microwave-assisted digestion systems, this technology has not been implemented to any considerable extent in large scale routine analyses of plants due to high costs involved in acquisition and maintenance.…”

Section: Introductionmentioning

confidence: 99%

“…16,17 Although closed-vessel digestion systems may employ microwave-assisted or conductive heating, 5 most recent research and development in the sample preparation eld is concentrated on the former. 4,5,[8][9][10]18 Considering that digestion blocks are commonly used in most small to medium-size laboratories worldwide involved in plant analysis, the development of a simple, rugged, low cost and efficient device for sample preparation based on conductive heating and closed-vessels may be considered attractive.…”

Section: Introductionmentioning

confidence: 99%