The advantage of temperature feedbackcontrolled microwave assisted leaching under atmospheric pressure in comparison with conventional methods for environmental applications
- Duquesne Univ., Pittsburgh, PA (United States)
Temperature is an important key parameter for reactions, digestions and extractions. Therefore the control of temperature is the critical variable in environmental leach testing. Currently, many leach methods are accomplished on hot plates in beakers or flasks. These methods are very traditional, inefficient and imprecise. An advantage may be obtained by substituting microwave dissolution, improving efficiency, accuracy and precision through direct microwave energy coupling. Microwave assisted modified 3050 leaching of key elements (Chromium, Copper, Nickel, Lead, and Zinc) of environmental importance using temperature feedback control has been tested and compared to conventional EPA Method 3050. Different temperature feedback control procedures, regulating the temperature from inside and outside the sample flask, are evaluated. The temperature inside the flask is acquired by a glass bulb thermometer based on gas law principles. An IR-Sensor is used for temperature acquiring for non invasive vessel control. A comparison of advantages and drawbacks of power controlled, temperature controlled, and conventional digestions will be discussed.
- OSTI ID:
- 466549
- Report Number(s):
- CONF-951017-; TRN: 96:005999-0081
- Resource Relation:
- Conference: 22. annual conference of the Federation of Analytical Chemistry and Spectroscopy Societies, Cincinnati, OH (United States), 15-20 Oct 1995; Other Information: PBD: 1995; Related Information: Is Part Of FACSS XXII - the 22nd annual conference of the Federation of Analytical Chemistry and Spectroscopy Societies; PB: 285 p.
- Country of Publication:
- United States
- Language:
- English
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