Trial

Regent used

Volume Ratio (ml)

Temp

(˚C)

Digestion Time (hr)

Observation

1

HNO₃:HClO₄

4:8

200

4:25

Clear Light yellow

2

HNO₃:HCLO₄

5:2

210

4:35

Deep yellow with suspension

3

HNO₃:HClO₄

3:2

210

3:05

Deep Yellow

4

HNO₃:H₂O₂

10:1

210

3:15

Clear yellow

5

HNO₃:HClO₄

4:8

240

4:00

Clear Colorless

6

HNO₃:HClO₄

5:8

240

4:10

Clear Light yellow

7

HNO₃:HClO₄:H₂O₂

3:2:1.5

240

4:00

Yellow

8

HNO₃:HClO₄:H₂O₂

3:2:1

240

4:35

Clear light yellow

9

HNO₃:HClO₄

5:1

300

3:00

Clear & colorless (optimized)

10

HNO₃:HClO₄

3:2

300

3:10

Cloudy suspension