Manual wet chemistry

Standardization of a Titrant For wet chemistry analytical methods, a titration is often used and the titrant, or the solution to which an unknown sample is compared, must be standardized. This can be done by comparing it with another standard. The important thing here is that the standard with which it is compared is ultimately traced to a SRM. The procedure utilizes volumetric glassware heavily, and thus the analyst must be assured that these are properly calibrated, as discussed above. Auto-titrators can be used (Figure 5.4). In this case, the automated equipment can be calibrated against manual equipment, i.e., volume readings obtained with the auto-titrator must match the volume readings obtained with a calibrated buret for the same sample. If they do not match (within accepted limits), the auto-titrator must be taken out of service and repaired, just like the defective balance. 

Mookherjea, S., and Mathre O., Classical and Wet Chemistry Applications in Industrial and Pharmaceutical Analysis, ACS Short Course Manual, American Chemical Society, Washington, D.C., 1998. 

These integrated activities require both professional knowledge and hands-on experience. Hence, this textbook is designed for a radioanalytical chemistry lecture course and an associated laboratory course. A laboratory manual and an instructor s guide are in preparation to support the text. The prerequisite study program should include (1) analytical chemistry lectures and associated wet-chemistry laboratory and (2) nuclear physics lectures and associated radiation detection laboratory. 

The general recommendation. Manual of Symbols and Terminology for Physicochemical Quantities and Units Appendix Definitions, Terminology and Symbols in Colloid and Surface Chemistry, Part I, (Prepared for publication by D.H. Everett), PureAppL Chem. 31 (1972) 578, also contains sections on wetting. 

For other air contaminants and wipe samples, so-called wet methods of chemical analysis may be employed. Full details can be found in pnblications snch as the US NIOSH Manual of Sampling Methods, publications from the UK Health and Safety Executive, Annals of Occupational Hygiene, Applied Industrial Hygiene, AIHA Journal, and analytical chemistry journals. 

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