We used a spectrophotometer in lab today. We found percent transmittance and absorbency of cobalt and chromium by placing a cuvette into the machine and setting a certain wavelength. Here's my data from the lab.
| Cr Ion |
|
|
| Wavelength (nm) |
% T |
Absorbance |
| 375 |
59.2 |
0.226 |
| 400 |
49.4 |
0.306 |
| 405 |
49.2 |
0.309 |
| 415 |
50.2 |
0.300 |
| 425 |
54.4 |
0.264 |
| 440 |
62.6 |
0.203 |
| 455 |
72.8 |
0.138 |
| 470 |
80.2 |
0.096 |
| 490 |
81.2 |
0.091 |
| 500 |
80.4 |
0.094 |
| 520 |
72.6 |
0.139 |
| 530 |
68.2 |
0.167 |
| 540 |
63.8 |
0.196 |
| 550 |
60.4 |
0.219 |
| 570 |
56.8 |
0.245 |
| 580 |
57.0 |
0.245 |
| 600 |
62.4 |
0.205 |
| 625 |
72.6 |
0.138 |
| Co Ion |
|
|
| Wavelength (nm) |
% T |
Absorbance |
| 375 |
98.8 |
0.006 |
| 400 |
92.4 |
0.035 |
| 405 |
90.0 |
0.047 |
| 415 |
86.4 |
0.063 |
| 425 |
80.4 |
0.094 |
| 440 |
66.0 |
0.180 |
| 455 |
49.6 |
0.305 |
| 470 |
40.2 |
0.396 |
| 490 |
32.2 |
0.492 |
| 500 |
30.4 |
0.518 |
| 520 |
31.6 |
0.500 |
| 530 |
38.0 |
0.422 |
| 540 |
47.8 |
0.320 |
| 550 |
58.6 |
0.232 |
| 570 |
78.6 |
0.104 |
| 580 |
85.4 |
0.069 |
| 600 |
90.2 |
0.045 |
| 625 |
92.2 |
0.036 |
And some pictures
I thought that using the spectrometer was really cool, and here's a link showing how it works in case you were interested https://www.youtube.com/watch?v=pxC6F7bK8CU
ReplyDeleteMe and my partner messed up by not turning the one nob all the way to the left so we had to stay late to finish it up, but we got all the data and it was all good in the end!