Determination of uranium in powdered quartz at ppb level by fission track method
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چکیده
منابع مشابه
Determination of uranium in porcelain teeth by the fission track method.
Porcelain teeth have been widely used in restorative and prosthetic dentistry because of their fine natures in aesthetics and hardness as an artificial denture. Among them there are some to which the uranium compounds have been added in order to simulate the fluorescence of the natural teeth. Recently, it was pointed out by several researchers that the radiations from uranium and its descendant...
متن کاملDetermination of uranium in human teeth, bones and tissues by the fission track method.
The uranium content of several human tooth, bone and soft tissue samples was determined by the fission tract method. The average uranium content in teeth, bones and soft tissues were 6.7, 8.4 and 64 ppb ash, respectively. The distribution of uranium in bones is less uniform than that of teeth, and the uranium content of soft tissues is generally higher than that of teeth and bone. The presence ...
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A solid-phase microextraction (SPME) method for the analysis of phthalates in water samples was developed on the CTC CombiPAL autosampler GC-MS platform. In this method, the sample preparation process was automated by using a CombiPAL autosampler, including the SPME fiber precondition, adsorption, and desorption, which improve the precision of the SPME method. The extraction temperature, extrac...
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تشکیل کمپلکس های tarبا یون های لانتانیم, ایتریم و توریم در دمای 25 درجه، قدرت یونی ثابت 0.1 مولار و در ph ثابت در مخلوط حلال های اتانول – آب و استونیتریل – آب با استفاده از روش های اسپکتروفوتومتری مورد بحث و بررسی قرار گرفت. داده های اسپکتروفوتومتری با استفاده از نرم افزار squad پردازش شدند تا ثابت های تشکیل کمپلکس اندیکاتور – فلز را محاسبه کند. نتایج نشان می دهد که درصد حلال آلی در مخلوط حلال ...
15 صفحه اولDetermination of Aflatoxins B1 and B2 in Powdered Milk Using Modified Liquid Chromatography Method
Background & Aims: In this study, using a liquid-liquid microextraction method for pre-concentration trace amounts of aflatoxins, the amount of Aflatoxins B1 and B2 in powdered milk was determined. Determination of aflatoxins was done by using high-performance liquid chromatography coupled with fluorescent detector. Method: Samples were extracted by immunoaffinity column (IAC) clean-up, and the...
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ژورنال
عنوان ژورنال: Fresenius' Zeitschrift für analytische Chemie
سال: 1987
ISSN: 0016-1152
DOI: 10.1007/bf00487232