I thought this might help from Dr. Young's book on the pH Miracle: "Just as our body temperature must be maintained at 98.6 degrees Fahrenheit, our blood is ideally maintained at 7.365 pH--very mildly basic. (A mainstream doctor would accept up to 7.4, but that's problematic, as we'll see later.) You can also measure the pH of the urine and saliva, but the blood is the most important and needs to stay within the tightest range. Different areas of the body have different pH requirements anyway. For example, the blood and tissues should be slightly basic, but the lower bowel should be slightly acidic, and the urine slightly acidic or neutral. Saliva tends to be erratic. The pH of urine can provide the best estimate of what's happening in the body's tissues but it is not always accurate. Blood pH is more reliable, and thus a better indicator of internal conditions."

Are you testing urine or saliva? I believe first morning urine is the best, next to blood.