Resolution basic parameters controlling

The NAA method can be divided into NAA (Instrumental NAA) and RNAA (Radiochemical NAA). In the latter, the various neutron-induced products are separated chemically to minimize interferences. There are several comprehensive review papers on INAA published in the literature 1,2,3,4). Briefly, the basic parameters controlling sensitivity for a multi-element determination are neutron flux, irradiation time, delay interval prior to counting, half-life and gamma-ray energy of the induced activity, and eflBciency and resolution of the detector. Table I outlines the irradiation parameters used for each of the two sequential irradiations. The final count occurring 40-50 days after the second irradiation is performed on an anti-coincidence-shielded Ge(Li) system developed recently in our laboratory. 

An exemplary camera head unit is shown in Fig. 25. The camera head unit contains the image sensor, a micro controller unit (MCU), Flash memory, and power regulator, as well as a device to serialize the image data for transmission over the vehicle interconnect. The MCU and Flash memory are used to configure the camera head components at startup with basic parameters such as resolution and timing. The vehicle interconnect systems deployed for CMS can be bidirectional, transmitting image data from the camera head, and control information from the ECU. Some interconnects may also supply power or there may be a dedicated power supply connection to the camera head. 

Adequate resolution of the components of a mixture in the shortest possible time is nearly always a principal goal. Establishing the optimum conditions by trial and error is inefficient and relies heavily on the expertise of the analyst. The development of computer-controlled HPLC systems has enabled systematic automated optimization techniques, based on statistical experimental design and mathematical resolution functions, to be exploited. The basic choices of column (stationary phase) and detector are made first followed by an investigation of the mobile phase composition and possibly other parameters. This can be done manually but computer-controlled optimization has the advantage of releasing the analyst for other... 

The chiral resolutions on re-acidic and re-basic CSPs were carried out under the normal phase mode. However, some reports are also available dealing with the use of reversed-phase eluents, but the prolonged use of the reversed-phase mobile phase is not recommended. With the development of the more stable and new CSPs, the use of the reversed-phase mode came into existence on these CSPs. Currently, both modes of mobile phases (i.e., normal and reversed) are in use. Therefore, the optimization of the chiral resolution on these phases can be achieved by varying the concentration of the mobile phases, including the use of organic modifiers. In addition, the temperature, structures of solutes, and CSPs are also important parameters that control the chiral resolution on these CSPs. 

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