کاربرد نانولوله کربنی چند دیواره سنتز شده با تکنیک سل – ژل برای تعیین تتراکلرید کربن درهوا با روش ریز استخراج فاز جامد
Authors
Abstract:
Background and aims: Conventional Methods for determination of volatile organic pollutants in the air are based on solvent extraction. Solid-phase microextraction (SPME) has been popular as an environmentally friendly technique to extract a very wide range of analytes. SPME fibers have some drawbacks that can be overcome by use of sol-gel nanosorbents. Therefore the aim of this study has been to evaluate a nano fiber for sampling and determination of carbon tetrachloride in air. Methods: In this study, a novel multi-walled carbon nanotube fiber based on sol-gel technique was synthesized and the effects of several factors during sampling and determination of carbon tetrachloride were evaluated and finally compared with Carboxen/Polydimethylsiloxane (CAR/PDMS) as a commercial fiber. Results: Results showed that the performances of proposed fiber under optimal conditions demonstrated better performances in lower level of both temperature and relative humidity. The efficient temperatures for thermal desorption were 280 °C. The desorption times were obtained at 3 min. The relative standard deviation (RSD) for repeatability ranged between 4 to 4.3 % for reproducibility ranged between 3.2 to 4.5 % .In comparative studies to CAR/PDMS, the results were acceptable. Conclusion: Solid-phase microextraction with synthesized nano fiber is a simple, sensitive and applied method that can use successfully for determination of carbon tetrachloride in the air.
similar resources
اثر بربرین در تنظیم آستروسیتهای Gfap+ ناحیه هیپوکمپ موشهای صحرایی دیابتی شده با استرپتوزوتوسین
Background: Diabetes mellitus increases the risk of central nervous system (CNS) disorders such as stroke, seizures, dementia, and cognitive impairment. Berberine, a natural isoquinolne alkaloid, is reported to exhibit beneficial effect in various neurodegenerative and neuropsychiatric disorders. Moreover astrocytes are proving critical for normal CNS function, and alterations in their activity...
full textاثر بربرین در تنظیم آستروسیتهای Gfap+ ناحیه هیپوکمپ موشهای صحرایی دیابتی شده با استرپتوزوتوسین
Background: Diabetes mellitus increases the risk of central nervous system (CNS) disorders such as stroke, seizures, dementia, and cognitive impairment. Berberine, a natural isoquinolne alkaloid, is reported to exhibit beneficial effect in various neurodegenerative and neuropsychiatric disorders. Moreover astrocytes are proving critical for normal CNS function, and alterations in their activity...
full textپیش تغلیظ و تعیین کادمیم (ii) با استفاده از نانولوله های کربنی چند دیواره اصلاح شده با لیگانداکسیم پروپیانات به روش استخراج فاز جامد-اسپکترومتری جذب اتمی شعله
کربن نانوتیوپ های چند دیواره (mwcnts)به طریق شیمیایی بوسیله لیگاند اکسیم پروپیانات اصلاح گردیده است. این جاذب، یک فاز جامد جدید، موثر و کارا برای استخراج فاز جامد کادمیم می باشد. این روش مبتنی بر جذب شیمیایی کادمیم بر روی کربن نانوتیوپ و شویش موثر با یک شوینده مناسب می باشد. پارامترهای موثر بر سیستم نظیر ph، مقدار فاز جامد، محلول شوینده (نوع، حجم و غلظت) اثر زمان همزدن و اثر حضور یون های دیگر ب...
15 صفحه اولMy Resources
Journal title
volume 13 issue 2
pages 78- 68
publication date 2016-05
By following a journal you will be notified via email when a new issue of this journal is published.
No Keywords
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023