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شیمی و آزمایشگاه شیمی - شناسایی عناصر در ترکیبات آلی (۳) شناسایی ازت

شناسایی عناصر در ترکیبات آلی (۳) شناسایی ازت

نویسنده :Minaeifar
تاریخ:جمعه 27 مهر 1386-04:10 ق.ظ

شناسایی عناصر در ترکیبات آلی (تجزیه کیفی مواد آلی به روش ذوب قلیایی جهت تشخیص ازت، گوگرد و هالوژنها)

3- شناسایی ازت

حدود 1 میلی لیتر محلول صاف شده مرحله قبل را در یک لوله آزمایش ریخته و به آن کمی سولفات فرو اضافه کنید و محلول را به آرامی و همراه با تکان دادن تا نقطه جوش حرارت دهید و سپس بدون سرد نمودن محلول را با اسید سولفوریک رقیق اسیدی کنید. رسوب یا رنگ آبی پروس دلیل بر وجود نیتروژن است. افزودن 1 میلی لیتر محلول 5% فلوئورید پتاسیم برای تشکیل آبی پروس مفید است.




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