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Analysis technique of trihalomethanes by GC-FID device | ||
| Iranian Journal of Analytical Chemistry | ||
| دوره 12، شماره 1 - شماره پیاپی 23، خرداد 2025، صفحه 109-122 اصل مقاله (1.18 M) | ||
| نوع مقاله: Full research article | ||
| شناسه دیجیتال (DOI): 10.30473/ijac.2025.76092.1327 | ||
| نویسندگان | ||
| Keivan Shayesteh* 1؛ K. Karimi2؛ Nabiollah Sepehri3؛ Zohreh Mozafari4 | ||
| 1گروه مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران | ||
| 2PhD Student, Dept. of Chemical Engineering, Faculty of Engineering,University of Mohaghegh Ardabili, Ardabil, Iran | ||
| 3Expert in Charge of Chemical and Device Laboratories, Shiraz Water and Wastewater Company, Shiraz, Iran | ||
| 4Quality Monitoring and Control Director, Shiraz Water and Wastewater Company, Shiraz, Iran | ||
| چکیده | ||
| In water chlorination for removing pathogens, trihalomethanes (THMs) are among the significant carcinogenic by-products of drinking water chlorination. The conventional measurement means for these compounds is a GC device with an ECD detector (GC-ECD) or GC/MS. A GC-ECD or a GC/MS is utilized for analyzing THMs at the microgram per liter scale. Purchasing an ECD detector is not easy or cost-effective. This article introduces a new concentration method using the Head Space technique in a GC-FID device for measuring the concentration of THMs. In this method, four compounds, chloroform (CHCl3), di-bromochloromethane (CHClBr2), bromodichloromethane (CHCl2Br) and bromoform (CHBr3), are plotted on a 5-point calibration chart after being measured on a microgram per liter scale. This method, designed in a laboratory, can be used to measure concentrations and analyze data in the laboratories of water and wastewater, environment, petroleum and petrochemistry, etc. High accuracy of the method (µg/L) is the main feature of this method. Here, the design method and advantages of this method are presented with diagrams and tables. | ||
| کلیدواژهها | ||
| Measurement accuracy؛ Concentration method؛ Water distribution network؛ Head Space technique؛ Electron Capture Detector (GC-ECD) | ||
| عنوان مقاله [English] | ||
| تکنیک آنالیز تری هالومتان ها با دستگاه GC-FID | ||
| نویسندگان [English] | ||
| کیوان شایسته1؛ | ||
| چکیده [English] | ||
| در کلرزنی آب برای حذف عوامل بیماریزا، تریهالومتانها (THMs) از جمله محصولات جانبی سرطانزای مهم کلرزنی آب آشامیدنی هستند. ابزار اندازهگیری مرسوم برای این ترکیبات، دستگاه GC با آشکارساز ECD یا دستگاه GC/MS است. از GC-ECD یا GC/MS برای آنالیز THMها در مقیاس میکروگرم در لیتر استفاده میشود. خرید آشکارساز ECD بخاطر تحریم های بین المللی آسان یا مقرون به صرفه نیست. این مقاله یک روش تغلیظ جدید با استفاده از تکنیک فضای فوقانی در دستگاه GC- FID برای اندازهگیری غلظت THMها معرفی میکند. در این روش، چهار ترکیب، کلروفر (CHCl3)، دی-برموکلرومتان (CHClBr2)، برومودیکلرومتان (CHCl2Br) و بروموفرم (CHBr3)، پس از اندازهگیری در مقیاس میکروگرم در لیتر، روی یک نمودار کالیبراسیون 5 نقطهای رسم میشوند. این روش که در آزمایشگاه طراحی شده است، میتواند برای اندازهگیری غلظت و آنالیز دادهها در آزمایشگاههای آب و فاضلاب، محیط زیست، نفت، پتروشیمی و غیره مورد استفاده قرار گیرد. دقت بالای روش (میکروگرم بر لیتر) از ویژگیهای اصلی این روش است. در اینجا، روش طراحی و مزایای این روش با نمودارها و جداول ارائه شده است. | ||
| کلیدواژهها [English] | ||
| دقت اندازهگیری, روش تغلیظ, شبکه توزیع آب, تکنیک فضای فوقانی, آشکارساز جذب الکترون (GC-ECD) | ||
| مراجع | ||
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