Column Description |
Union |
Column Temperature |
40°C |
Flow Rate
|
1.0 ml/minute |
Detection Wavelength |
270 nm |
Injection Volume |
20 µl |
Step No. |
Time (min) |
Function |
A % |
B % |
Initial |
- |
- |
100.0 |
0.0 |
1 |
0.1 |
1 |
0.0 |
100.0 |
2 |
12.5 |
1 |
0.0 |
100.0 |
3 |
12.6 |
1 |
100.0 |
0.0 |
4 |
25.0 |
1 |
100.0 |
0.0 |
5 |
25.1 |
1 |
90.0 |
10.0 |
6 |
35.0 |
1 |
90.0 |
10.0 |
7 |
35.1 |
1 |
50.0 |
50.0 |
8 |
45.0 |
1 |
50.0 |
50.0 |
9 |
45.1 |
1 |
10.0 |
90.0 |
10 |
55.0 |
1 |
10.0 |
90.0 |
11 |
55.1 |
1 |
0.0 |
100.0 |
12 |
65.0 |
1 |
0.0 |
100.0 |
13 |
65.1 |
1 |
100.0 |
0.0 |
Flow rate |
1.0 ml/min |
Detection wavelength |
273 nm |
Column |
250 x 4.6 mm, 5 µ (ODS) |
Mobile phase |
Methanol |
Column temperature |
25°C |
Run Time |
5 mins |
Retention time of Caffeine |
about 3 mins |
Type of solution |
No. of Injection |
Injection volume |
Wavelength |
Blank (Mobile phase) |
1 |
20 µl |
273 nm |
50µg/ml Caffeine standard |
2 |
10 µl |
273 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
273 nm |
50µg/ml Caffeine standard |
2 |
30 µl |
273 nm |
50µg/ml Caffeine standard |
2 |
40 µl |
273 nm |
50µg/ml Caffeine standard |
2 |
50 µl |
273 nm |
Blank (Mobile phase) |
1 |
20 µl |
273 nm |
Type of solution |
No. of Injection |
Injection volume |
Wavelength |
Blank (Mobile phase) |
1 |
20 µl |
273 nm |
50µg/ml Caffeine standard |
6 |
20 µl |
273 nm |
Blank (Mobile phase) |
1 |
20 µl |
273 nm |
Type of solution |
No. of Injection |
Injection volume |
Wavelength |
Blank (Mobile phase) |
1 |
20 µl |
270 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
270 nm |
Blank (Mobile phase) |
1 |
20 µl |
271 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
271 nm |
Blank (Mobile phase) |
1 |
20 µl |
272 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
272 nm |
Blank (Mobile phase) |
1 |
20 µl |
273 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
273 nm |
Blank (Mobile phase) |
1 |
20 µl |
274 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
274 nm |
Blank (Mobile phase) |
1 |
20 µl |
275 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
275 nm |
Blank (Mobile phase) |
1 |
20 µl |
276 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
276 nm |
Blank (Mobile phase) |
1 |
20 µl |
277 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
277 nm |
Blank (Mobile phase) |
1 |
20 µl |
278 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
278 nm |
Blank (Mobile phase) |
1 |
20 µl |
278 nm |
Blank (Mobile phase) |
1 |
20 µl |
279 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
279 nm |
Blank (Mobile phase) |
1 |
20 µl |
279 nm |
Blank (Mobile phase) |
1 |
20 µl |
280 nm |
50µg/ml Caffeine standard |
2 |
20 µl |
280 nm |
Blank (Mobile phase) |
1 |
20 µl |
280 nm |
Type of solution |
No. of Injection |
Injection volume |
Blank (B1) |
3 |
20 µl |
20 µg/ml Caffeine standard |
6 |
20 µl |
Blank (B2) |
1 |
20 µl |
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