Document verification is an important aspect of forensic chemistry because the date and conditions under which a document is written are very important. In this case a worker was fired from a job after working there for years. The ex-employee states that he was fired because the boss is a Cardinals fan and he is a Red Sox fan, so when the Red Sox won the world series his boss fired him. The boss states that this particular employee has had several years of bad employee evaluations which is the real reason for the job loss. The employee evaluations are handwritten in blue ink on paper and have been in a filing cabinet since being written. The ex-employee claims that the bad comments written on the evaluations were added afterwards. Your job is to determine if the first and last sentences were written at the same time.
Read the following paper to get an idea of how to do this. Dating of ballpoint pen ink

Objectives:

1. Become familiar with using LC
2. Understand the chemistry of aging inks
3. Practice changing an LC method for optimization
4. Review error and confidence levels

1. Determine an extraction procedure for the blue ink
2. Measure the absorbtion spectrum for the ink
3. Using a stock solution (not your unknown) try and separate the ink using LC
4. Adjust your LC method, if needed, to get a better separation
5. Analyze the two samples from the evaluation report
6. Determine if they were written at the same time
7. Justify your answer