Handling Device and Microprocessor Control

Modem HPLC is adequately provided with complete data handling devices. Thousands of samples routinely analysed in Quality Assurance Laboratories in Pharmaceutical Industries/Bulk Drug Industries etc. are duly processed and the data stored in the computerised data-handling devices. Each stored data may be retrieved from the memory of the computerised device with the flick of a finger, as and when needed, in the form of print-out. 

Microprocessor based analytical equipments is no longer an uncommon phenomenon towards the modernization, automation, and above all the ease of function and handling of sophisticated devices, for instance a microprocessor scans the array of diodes many times a second in a diode array detector a microprocessor does the temperature programming of a constant temperature chamber of HPLC unit. 

The main purpose of derivatization in HPLC is to improve detection specifically when determining traces of solutes in complex matrices, for example  

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Describe a supervisory control system for the plant of Example 23.4 (Figure 23.10) using as local controllers (a) analog devices controlling one loop each, and (b) microcomputers capable of handling four loops each. How would you select the loops to be controlled by each local microprocessor ... 

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