نوع مقاله : مقاله پژوهشی کامل
نویسندگان
گروه شیمی، صندوق پستی 4667-16365، دانشگاه پیام نور، تهران، ایران
چکیده
چکیده
در این مطالعه، ثابت تفکیک اسیدی سه شناساگر بروموکرزول سبز، فنل فتالئین و متیل اورانژ به وسیله اسکن محلول این شناساگرها، قرار دادن کاغذ pH در محلول ها (در هر مرحله از تغییر رنگ محلول) و سپس با استفاده از روش کمومتریکس تعیین گردید. این روش ها ساده، سریع و کم هزینه هستند. برای این منظور، ابتدا ظروف حاوی محلول شناساگر و کاغذ pH (در هر مرحله از تغییر رنگ محلول) اسکن شدند و سپس تصاویر محلول های نمونه و کاغذهای pH به یک کامپیوتر مجهز به Microsoft Photo Editor (Microsoft XP) منتقل گردیدند. مقادیر RGB در هر پیکسل با استفاده از جعبه ابزار پردازش نرم افزار MATLAB اندازه گیری شد. در نرم افزار MATLAB (2013) یک برنامه ی جدید بر اساس مقادیر RGB، برای محاسبه ی ثابت تفکیک اسیدی شناساگرها نوشته شد. تطابق ثابت تفکیک اسیدی به دست آمده با این روش و مقادیر گزارش شده در متون، کارایی روش به کار برده شده در اینجا را نشان می دهد.
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