Detecting fluoride toothpaste to protect oral health
Fluoride is one of the 14 trace elements necessary for humans. Fluoride in human body is mainly found in bones, teeth and soft tissues. Most toothpastes on the market are fluoride-containing. The Oral Health Guide for Chinese Residents believes that brushing teeth with fluoride toothpaste is a safe and effective anti-mite measure. It is recommended to use fluoride toothpaste to prevent rickets, especially for children with tendencies. Used by the elderly. However, if the fluorine is excessive, the harm is not small. The lighter causes the fluorosis of the mouth to be yellow and hairy, and the severe one is the fluorosis, which makes the patient's joint pain, difficulty in movement, and loss of labor ability.
The fluorine in the fluoride toothpaste on the market is mainly present in the form of stannous fluoride, sodium monofluorophosphate or sodium fluoride. China's toothpaste implementation standard GB 8372-2008 marked: adult toothpaste fluoride content between 0.05% -0.15%, children's toothpaste fluoride content between 0.05% -0.11%. At present, the commonly used measuring methods for toothpaste manufacturers include gas chromatography, ion chromatography, spectrophotometry, titration and fluoride ion selective electrode .
The fluoride ion selective electrode method is a time-saving, environmentally friendly and economical test method. The ion meter measures the ion concentration in the solution by measuring the electromotive force of the battery composed of the solution, the ion selective electrode and the reference electrode.
This time, Ohaus engineers selected six toothpastes commonly found in the market: two-sided needle, Kao, Yunnan Baiyao, Lion King, Colgate, and Chinese Toothpaste for fluorine content testing.
The composite fluoride ion selective electrode was sequentially inserted into the above by preparing a fluoride ion standard solution containing ISA solution at concentrations of 1 mg/L, 2 mg/L, 3 mg/L, 4 mg/L, and 5 mg/L, respectively. In the standard solution, the corresponding potential mV and concentration values ​​are obtained.
Choose the Ohaus ST5000i benchtop ion meter, which allows direct reading of concentrations without complex formula conversion (eg pX, mol/L, mg/L, etc.)
After a few minutes of testing, the results are as follows:
Through the above test data, it can be seen that the fluorine content of these toothpastes is lower than the limit value of 0.15% of the national standard documents. The accuracy of the selective electrode method is high, and the method of measuring the fluorine content of the toothpaste is simple, quick and reliable.
ST5000i Benchtop Ion Meter Advantages
- Easy to set up, powerful <br> Large data storage, can store up to 1000 test data, multiple calibration and test modes, calibration reminders, multiple endpoint determination modes, GLP measurement functions, etc.
- Clear display and intuitive operation
The 4.3-inch large color LCD screen can be measured and calibrated by touch operation.
- sturdy and durable, innovative design
IP54 grade waterproof and dustproof instrument, standard transparent protective cover can be used in harsh experimental environment, innovative independent electrode holder can be rotated 360° without dead angle, RS232 interface printout and USB interface can easily export data.
Friendly interface, large screen display
Ohaus's latest ST5000i benchtop ion meter is simple, fast and accurate. It can detect different ion content without chemical separation. It is a good helper for your intelligence. For more product information, please contact us!
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