private HashMap<String, Integer> getDNP_500() {
        HashMap<String, Integer> map = new HashMap<String, Integer>();

        map.put("C", 29);
        map.put("H", 72);
        map.put("N", 10);
        map.put("O", 18);
        map.put("P", 4);
        map.put("S", 7);
        map.put("F", 15);
        map.put("Cl", 8);
        map.put("Br", 5);

        return map;
    }
private HashMap < String , Integer > getDNP_500 ( ) { HashMap < String , Integer > map = new HashMap < String , Integer > ( ) ; map . put ( "C" , 29 ) ; map . put ( "H" , 72 ) ; map . put ( "N" , 10 ) ; map . put ( "O" , 18 ) ; map . put ( "P" , 4 ) ; map . put ( "S" , 7 ) ; map . put ( "F" , 15 ) ; map . put ( "Cl" , 8 ) ; map . put ( "Br" , 5 ) ; return map ; }
Get the map linking the symbol of the element and number maximum of occurrence.
For the analysis with the DNP database and mass lower than 500 Da.

@return The HashMap of the symbol linked with the maximum occurrence