334 CHEMICAL ANALYSIS. 



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or mixtures, is determined by processes analogous to 

 these which have above been described. 



849. SEPARATION INTO GROUPS. In the 

 Nation into 1 analysis of substances containing many con- 

 groups effect- stituents, a separation into groups, precedes 

 the isolation of the individual constituents. 

 This is effected by the use of certain agents, in suc- 

 cession, which have the property of precipitating whole 

 groups. These being again dissolved, are commonly 

 subdivided into smaller groups by similar means. The 

 detection and separation of the individual constituents 

 is finally accomplished by means already described. 

 Some general idea of the process of inorganic analysis 

 may be obtained from the foregoing. Particulars upon 

 this subject must be sought in works on analytical 

 chemistry. 



