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.
About Alkaline Body pH. The Internal pH of the Human Body. Is One of the Key Factors in Maintaining Organic Balance. The scale that is used for measuring the pH, or hydrogen ion concentration â¦ is from 0 to 14, with 7 being the neutral point. Thus, an Alkaline Body pH means that the pH of the blood is above 7 with the ideal pH being 7.35. Outside of this range â¦ the body activity is no longer optimal and the metabolism is out of balance. The pH of the body is influenced by metabolic subproducts and our diet.