Atomic Emission Detectors

Atomic emission detectors (AED), one of the newest addition to the gas chromatographer's arsenal, are element-selective detectors that utilize plasma, which is a partially ionized gas, to atomize all of the elements of a sample and excite their characteristic atomic emission spectra. AED is an extremely powerful alternative that has a wider applicability due to its based on the detection of atomic emissions.There are three ways of generating plasma: microwave-induced plasma (MIP), inductively coupled plasma (ICP) or direct current plasma (DCP). MIP is the most commonly employed form and is used with a positionable diode array to simultaneously monitor the atomic emission spectra of several elements.

Instrumentation

The components of the Atomic emission detectors include 1) an interface for the incoming capillary GC column to induce plasma chamber,2) a microwave chamber, 3) a cooling system, 4) a diffration grating that associated optics, and 5) a position adjustable photodiode array interfaced to a computer.

Figure 1. Schematic of atomic emission detector

مواضيع ذات صلة

التحليل الطيفي

الإشعاع الكهرومغناطيسي Electromagnetic Radiation

مكونات الجهاز المستخدم في التحليل الالي

طرق التحليل الآلي Instrumental Methods) )

اطياف الاشعة تحت الحمراء

تشتت الدوران البصري والانكسار المزدوج الدائري

مطياف الفلورة (التألق) Fluorescence spectroscopy

الضوء المستقطب والنشاط الضوئي

الدوران النوعي

البولاريمتر

Electrophoretic Mobility 2

Capillary Electrophoresis 2