Chapter 12. Proteins, Enzymes, and Vitamins
Other than collecting household items, no advance preparation is required for any of the procedures in this lab session. Procedure 2 requires at least one urine specimen, which you should obtain immediately before you begin the session. If there will be a significant delay between obtaining the specimen and doing the lab session, refrigerate the specimen in a full, tightly capped container until shortly before you begin the session.
Warning
We’ll assume that you’re healthy and using your own urine, which presents no biohazard to you. In fact, urine obtained from any healthy person is sterile unless it is contaminated during collection. If you obtain urine specimens from others, wash your hands with soap ...
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