Abstract
In most biochemical analyses, a flow-through heating arrangement is needed to reduce the reaction time or maintain a constant temperature. A rectangular reactor is described that is constructed of aluminium, is hollow inside and is filled with silicone oil. The glass coil through which the solution flows is immersed in the silicone oil. The heater, a Peltier-effect heat pump, on one side and the temperature sensor on the other side of the reactor body are embedded for heating and temperature control. The brief performance evaluation of the reactor is discussed by measuring the absorbance of urea concentration at different temperatures.
Highlights
In flow analysis, a flow-through heating arrangement is necessary to accomplish a desired reaction within a reasonable time
Regarding the use of conventional heated reactors, they have been in use over the past decade for measurement of formaldehyde (HCHO) [2], carbonyl compounds in general [3], ammonia [4] and peroxides [5], for the field measurement of atmospheric formaldehyde [6], and for water borne arsenic [7]
Heated reactors based on polymeric tubing are most common and such reactors are typically used in a manner in which they are put in a heated bath or an otherwise thermally conductive potting in which a heater and a temperature sensor are embedded for heating and temperature control
Summary
A flow-through heating arrangement is necessary to accomplish a desired reaction within a reasonable time. . Working urea colour reagent: 20 ml 2.5% diacetyl monoxime and 20 ml 0.5% thiosemicarbazide, transferred to a 100-ml volumetric flask, made to 100 ml with distilled water and shaken thoroughly. The heating reactor (figure 1) consists of an aluminium body, heater, temperature sensor, glass coil and silicone oil. Silicone oil is used to maintain the heating element at a constant temperature.
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