1. Melting point determination

2. Why take melting point? To help identify sample To help identify sample To check purity of sample To check purity of sample

3. Filling sample holder dip the open end of the capillary into dry, powdered sample several times, shoving more in each time

4. Packing the sample drop the capillary (closed end down) through a long glass tube several times until sample is compacted at the bottom

5. Turn machine on, and set resistor for temp range ON button indicated by white arrow. Set dial to expected melting range

6. How to determine the right setting This chart shows heating curves at various settings. For accurate m.p. determination the expected m.p. is on the flat part of the curve

7. Taking m.p. Turn on the digital thermometer

8. Taking m.p. insert up to 3 samples

9. Wait for and watch samples melt. Record melting range