An accurate test for how long does nicotine stay in your system can be performed via blood test. If a laboratory is testing for nicotine, it should be performed within 3 days of smoking. It is better for a laboratory to test for cotinine as it remains in the blood stream for about 10 days after smoking.
The pH in the human digestive tract varies greatly (see Human Digestive Tract pH Range Chart on the left side). The pH of saliva is usually between 6.5 - 7.5. After we chew and swallow food it then enters the fundic or upper portion of the stomach which has a pH between 4.0 - 6.5.he pH of any solution is the measure of its hydrogen-ion concentration. The higher the pH reading, the more alkaline and oxygen rich the fluid is. The lower the pH reading, the more acidic and oxygen deprived the fluid is. The pH range is from 0 to 14, with 7.0 being neutral.
Well, the body has its own sort of litmus test: Itâs called your pH level. And many health care professionals consider a balanced pH level to be the key to good health. The term pH stands for Potential Hydrogen, which is the concentration of hydrogen ions in a substance or solution. The pH range is 0 to 14. Human blood pH is ideally 7.35. Higher numbers indicate alkalinity; lower numbers indicate acidity.