Std Order Run Order Conc of AgNO3 (M) Volume of reductant (ml) Ph Tecmperature (°C)  Reaction Volume (ml) Illumination 1 1 0.01 3 9 27 250 Dark 15 1 0.001 15 9 27 1000 Dark 19 1 0.001 15 9 80 250 Light 5 1 0.01 15 6 80 1000 Dark 21 1 0.001 3 6 80 1000 Light 6 1 0.01 15 9 27 1000 Light 13 1 0.01 3 9 27 250 Dark 11 1 0.001 15 6 27 250 Light 3 1 0.001 15 9 27 1000 Dark 8 1 0.001 3 9 80 1000 Dark 7 1 0.001 15 9 80 250 Light 9 1 0.001 3 6 80 1000 Light 24 1 0.001 3 6 27 250 Dark 10 1 0.01 3 6 27 1000 Light 14 1 0.01 15 6 80 250 Dark 16 1 0.01 3 9 80 250 Light 18 1 0.01 15 9 27 1000 Light 4 1 0.01 3 9 80 250 Light 17 1 0.01 15 6 80 1000 Dark 23 1 0.001 15 6 27 250 Light 2 1 0.01 15 6 80 250 Dark 22 1 0.01 3 6 27 1000 Light 20 1 0.001 3 9 80 1000 Dark

Table 1: Plackett Burman analysis using Minitab 16 generated a 24 run table for 6 factors; all experiments were done in duplicates.