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Common turbidity determination methods are spectrophotometry, visual turbidimetry, turbidity meter method. The unit of measurement used by the ISO standard is the FTU (turbidity unit), and the FTU is consistent with the NTU (turbidity measurement unit).
Spectrophotometric principle: At a suitable temperature, a certain amount of barium sulphate and hexamethyleneamine are polymerized to form a white polymer, which is used as a turbidity standard solution, and compared with the turbidity of the water sample under certain conditions.
Visual turbidimetry principle: The water sample was compared with a standard solution prepared with diatomaceous earth (white clay). The turbidity equivalent to 1 mg of diatomaceous earth (white clay) of a certain particle size in 1000 ml of water is called 1 degree.
Turbidimeter principle: According to the ISO 7027 international standard for design, a beam of infrared light is passed through the sample cell containing the sample to be measured. The light source is an infrared emitting diode with a high emission intensity of 890 nm to ensure the interference caused by the color of the sample. To reach the minimum. The sensor is in a position perpendicular to the emitted light. It measures the amount of light scattered by the suspended particles in the sample. The microcomputer processor then converts the value into a turbidity value (transmitted turbidity value and scattered turbidity value are numerically consistent. ).
Turbidity unit conversion table JTU (degrees) FTU (NTU) SiO2 (mg/l)
JTU (degrees) 1192.5
FTU (NTU) 0.05310.13
SiO2(mg/l) 0.47.51
The wine industry uses EBC units, 1 FTU = 4 EBC.
Spectrophotometric principle: At a suitable temperature, a certain amount of barium sulphate and hexamethyleneamine are polymerized to form a white polymer, which is used as a turbidity standard solution, and compared with the turbidity of the water sample under certain conditions.
Visual turbidimetry principle: The water sample was compared with a standard solution prepared with diatomaceous earth (white clay). The turbidity equivalent to 1 mg of diatomaceous earth (white clay) of a certain particle size in 1000 ml of water is called 1 degree.
Turbidimeter principle: According to the ISO 7027 international standard for design, a beam of infrared light is passed through the sample cell containing the sample to be measured. The light source is an infrared emitting diode with a high emission intensity of 890 nm to ensure the interference caused by the color of the sample. To reach the minimum. The sensor is in a position perpendicular to the emitted light. It measures the amount of light scattered by the suspended particles in the sample. The microcomputer processor then converts the value into a turbidity value (transmitted turbidity value and scattered turbidity value are numerically consistent. ).
Turbidity unit conversion table JTU (degrees) FTU (NTU) SiO2 (mg/l)
JTU (degrees) 1192.5
FTU (NTU) 0.05310.13
SiO2(mg/l) 0.47.51
The wine industry uses EBC units, 1 FTU = 4 EBC.
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