Urine fluoride

Fluoride 2.6g in normal adults. Fluoride is absorbed from the intestines, and most of it is excreted by urine. 10% to 48% of the fluoride is stored in the body, mainly concentrated in the bones. Fluoride in the bone reaches a constant value by about 15 years of age. The right amount of fluoride is an essential element for the formation of hard teeth and the prevention of dental caries. Childhood lack of fluoride is prone to dental caries. The lack of fluoride in the elderly affects the use of calcium and phosphorus, making the bones brittle. However, excessive fluoride intake can also cause dental fluorosis, skeletal fluorosis and endemic fluorosis. Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Deficiency of fluoride in childhood is prone to dental caries; the lack of fluoride in the elderly affects the utilization of calcium and phosphorus, making bones brittle. Normal value: Urinary fluoride: 10-58μmol/L Above normal: Inorganic fluorine poisoning. negative: Positive: Reminder: The sample and standard curve should be measured at the same room temperature. The potential values ​​measured in the range of pH 4 to 7 are relatively stable. Normal value <0.053 mmol/24 h (<1 mg/24 h). 10 to 58 μmol/L (0.2 to 1.1 μg/ml). Clinical significance Increase inorganic fluorine poisoning. The result is low, the disease may be high : the result of dental caries is high. Possible diseases: precautions for skeletal fluorosis (1) The fluoroborate ion selective electrode is dropped into the electrode rod by 0.5 ml of the liquid filling (10-2 mol/L sodium chloride saturated with sodium chloride + 10-2 mol/L sodium fluoroborate solution) before use. Insert the internal reference electrode (silver/silver chloride) in a 10-3 mol/L sodium fluoroborate solution for 2 h to activate. After the test is completed, it should be immersed in deionized water and stored dry for long-term use. (2) Temperature and pH have a certain influence on the measurement, and the potential value and slope gradually decrease as the room temperature decreases. Therefore, the sample and standard curve should be measured at the same room temperature. The potential values ​​measured in the range of pH 4 to 7 are relatively stable. (3) The urine pigment is seriously interfered with the measurement, so the urine sample should be treated with activated carbon until it is colorless and transparent. Generally, 4 to 6 g of activated carbon is added per 50 ml of urine sample. The decolorization effect of activated carbon of different purity of different manufacturers is different. Generally, it is suitable to analyze pure powdered activated carbon. Inspection process The urine of the subject is collected and detected by chemical methods. Not suitable for the crowd Generally not. Adverse reactions and risks No.