tokens: The compatibility test procedure shall specify : 1 . The following parameters : ( a ) the test temperature or test temperatures ; ( b ) the test pressure or test pressures ; ( c ) the type of gas to blanket the container ; ( d ) the level of submersion of the solid ; ( e ) the number of samples to be tested ; ( f ) the duration of the test with a minimum of two weeks ; ( g ) a reference test on the fluid alone ; ( h ) a reference test on the solid alone . 2 . The selection of the test container , including : ( a ) the dimensions of the micro calorimeter , calorimeter or test vessel ; ( b ) the amount of fluid in the container in view of contamination and accuracies ; ( c ) the characteristics of the container together with the test specimen and the fluid ( e.g. surface conditions , passivation , and compatibility ) ; ( d ) the applicable safety procedures ; ( e ) the possibility to hermetically seal the container ( e.g. gas blanketing , pressure measurement ) ; 3 . The acquisition of the following data before and after the test : ( a ) weight of the solid and the liquid ; ( b ) dimensions of the solid ; ( c ) the surface condition , by examination of a sample surface by SEM or other microscope at a minimum magnification in agreement with the test objectives ; NOTE 1 This is to see changes in the surface condition due to e.g. corrosion , dissolution .