Type of method

Synthesized process condition

Conventional heating, Pd-Pt(CH)

This method was done by using oil bath to maintain the refluxing process condition was heated at reflux temperature for 3hr [22,23].

Microwave irradiation, Pd-Pt(MW)

Power of 100 watts was used. Time for the heating was dependent to the color of colloidal solution until it is started to change to dark brown.

Ultrasonic irradiation, Pd-Pt(US)

Ultrasonic bath (ELMA D-78224, type S60H) with frequency of 37kHz was used for this experiment. Temperature of 80°C as it was the maximum temperature for this equipment. Time for the heating was same with the microwave method.

Table 1: Different method and their synthesized process condition.