Pretreatment method and apparatus

A method for determining an unknown sample pretreatment solution, the method comprising:

• preparing a plurality of different types of first solutions;
• adding an unknown sample to the plurality of first solutions and determining whether or not the unknown sample is dissolved;
• selecting one among the plurality of first solutions in which the unknown sample is dissolved;
• preparing a plurality of second solutions by differentiating concentrations of the selected solution;
• adding an unknown sample to the second solution and determining whether or not the unknown sample is dissolved;
• and
• selecting a solution having the lowest concentration in which the unknown sample can be dissolved from among the second solutions.

A pretreatment apparatus for performing a pretreatment on an unknown sample, the apparatus comprising:

• a main body providing an internal space;
• an injection opening disposed on one surface of the main body;
• a storage unit disposed in the internal space of the main body and having one surface connected to the injection opening;
• a nozzle disposed on the other surface of the storage unit;
• a light source disposed in the internal space;
• and
• a detection unit disposed on a lower surface of the internal space.