Storage screening methods

Spontaneously combustible substances, screening methods, 43 5 Springfield, Massachusetts incident, 7 Startup/full-scale operation, chemical reactivity hazard management, 23-24 Storage... 

Some of the above methods can be miniaturized, and the instrumentation can be adapted for use in field situations (see Section 4 of this book (Potential Use of Screening Methods and Performance Evaluation)), and some can be used only in the laboratory. In the former case a spot sample can be taken, processed and analysed in the field without the need for sample preservation, transport, or storage. Since many of these methods are rapid, they can provide either quantitative (concentration) or qualitative (above or below a threshold) data on water quality in a time-scale that enables a timely and appropriate response (for instance in the case of an accidental spillage) or the rapid mapping of water quality in a wide area. Table 1.3.3 shows the main classes of chemical priority substances and the different methods that can be used for their analysis. 

Compounds that are radioactive can be located on a preparative layer by contact film autoradiography, electronic autoradiography, and storage phosphor screen imaging [21-23]. These methods differ in terms of factors such as simplicity, speed, sensitivity, and resolution, and the method of choice depends on the available equipment, reagents, and instrumentation. All are nondestructive, and the detected compounds can be recovered without change for later studies. 

A set of chemicals that has been labeled or annotated for easy storage and retrieval and that is available for screening. Consists of compounds synthesized by combinatorial or standard synthetic methods, purchased from commercial or academic sources, or samples of natural products either as pure samples or as mixtures. 

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