1. Oxidation reduction potential ORP:
The redox potential can help us understand what kind of oxidizing or reducing substances exist in water, and it is one of the comprehensive indicators of water. The reducing potential in water indicates the tendency of the water to release or acquire electrons. In the middle, the reducing agent loses electrons, and the oxidant gets electrons. The reaction formula is: Red=Qxne
Where: Red - reduced state;
Qx - oxidation state;
Ne - electronics.
The redox potential of this system can be expressed by the Nernst equation E=E0LnX (X=[Qx/Red])
In the formula:
n - the number of electrons participating in the reaction;
R——the gas constant;
T——absolute temperature (K);
F - Faraday constant.
The redox potential of water is determined by using rare metal (platinum) as the indicator electrode, saturated calomel or silver/silver chloride electrode as the reference electrode, and measuring the redox potential relative to the calomel or silver/silver chloride electrode. The value is then converted to the redox potential value relative to the standard hydrogen electrode as a report result.
The water normally in contact with the atmosphere has an oxidation-reduction potential of 0.3 to 0.5 V. Anoxic water is 0-0.2V, and dirty water can be -0.15V.
2. Temperature T:
The instrument uses a sensitive imported diode as a temperature sensor. With a certain DC voltage, the voltage across the diode changes with temperature. It is linear in the range of 0 to 100 °C. This signal is directly displayed and dissolved after treatment. , PH, conductance automatic temperature compensation.
3.PH: The measurement principle of the water quality analyzer PH follows the Nernst equation:
E=E0–2.303pH
Where: R - gas constant (8.314 joules / degree · mole);
T - the absolute temperature of the solution (273 t ° C);
F——Faraday constant (9.65×104 Coulomb/mol);
E0——the intercept potential of the electrode system can be regarded as a constant under certain conditions;
pH - the pH of the liquid to be tested;
E - Battery electromotive force generated by the electrode system.
The E value can be measured to measure the pH of the solution being measured.
4. Dissolved oxygen:
Water quality analyzer Dissolved oxygen refers to molecular oxygen dissolved in water or liquid phase, expressed as DO. The dissolved oxygen can reflect the extent to which water is contaminated by pollutants, especially organic matter. The instrument uses a polarographic thin film electrode method to determine DO.
The measuring principle is: when a fixed polarization voltage is applied between the anode and the cathode of the electrode, the dissolved oxygen in the water permeates through the oxygen film to be reduced on the cathode, and a diffusion current proportional to the oxygen concentration is generated, and the dissolved current can be calculated by measuring the current magnitude. The amount.
5. Conductivity:
Conductivity is the ability of a solution to conduct current. It is often used to indirectly estimate the total concentration of ionic components in water. Since the conductance is the reciprocal of the resistance, when two electrodes (usually platinum black electrodes) are inserted into the water, the two electrodes can be measured. The resistance R, according to Ohm's law, is proportional to the distance L (cm) of the electrode when the temperature is constant, and inversely proportional to the cross-sectional area A of the electrode. Namely: R=Ï·L/A, since the cross-sectional area A and the spacing L of the electrode are both fixed, L/A is a constant, called the conductance constant (indicated by Q), usually Q is fixed and known. When the conductance Sx is measured, the conductivity Kx can be calculated.
The redox potential can help us understand what kind of oxidizing or reducing substances exist in water, and it is one of the comprehensive indicators of water. The reducing potential in water indicates the tendency of the water to release or acquire electrons. In the middle, the reducing agent loses electrons, and the oxidant gets electrons. The reaction formula is: Red=Qxne
Where: Red - reduced state;
Qx - oxidation state;
Ne - electronics.
The redox potential of this system can be expressed by the Nernst equation E=E0LnX (X=[Qx/Red])
In the formula:
n - the number of electrons participating in the reaction;
R——the gas constant;
T——absolute temperature (K);
F - Faraday constant.
The redox potential of water is determined by using rare metal (platinum) as the indicator electrode, saturated calomel or silver/silver chloride electrode as the reference electrode, and measuring the redox potential relative to the calomel or silver/silver chloride electrode. The value is then converted to the redox potential value relative to the standard hydrogen electrode as a report result.
The water normally in contact with the atmosphere has an oxidation-reduction potential of 0.3 to 0.5 V. Anoxic water is 0-0.2V, and dirty water can be -0.15V.
2. Temperature T:
The instrument uses a sensitive imported diode as a temperature sensor. With a certain DC voltage, the voltage across the diode changes with temperature. It is linear in the range of 0 to 100 °C. This signal is directly displayed and dissolved after treatment. , PH, conductance automatic temperature compensation.
3.PH: The measurement principle of the water quality analyzer PH follows the Nernst equation:
E=E0–2.303pH
Where: R - gas constant (8.314 joules / degree · mole);
T - the absolute temperature of the solution (273 t ° C);
F——Faraday constant (9.65×104 Coulomb/mol);
E0——the intercept potential of the electrode system can be regarded as a constant under certain conditions;
pH - the pH of the liquid to be tested;
E - Battery electromotive force generated by the electrode system.
The E value can be measured to measure the pH of the solution being measured.
4. Dissolved oxygen:
Water quality analyzer Dissolved oxygen refers to molecular oxygen dissolved in water or liquid phase, expressed as DO. The dissolved oxygen can reflect the extent to which water is contaminated by pollutants, especially organic matter. The instrument uses a polarographic thin film electrode method to determine DO.
The measuring principle is: when a fixed polarization voltage is applied between the anode and the cathode of the electrode, the dissolved oxygen in the water permeates through the oxygen film to be reduced on the cathode, and a diffusion current proportional to the oxygen concentration is generated, and the dissolved current can be calculated by measuring the current magnitude. The amount.
5. Conductivity:
Conductivity is the ability of a solution to conduct current. It is often used to indirectly estimate the total concentration of ionic components in water. Since the conductance is the reciprocal of the resistance, when two electrodes (usually platinum black electrodes) are inserted into the water, the two electrodes can be measured. The resistance R, according to Ohm's law, is proportional to the distance L (cm) of the electrode when the temperature is constant, and inversely proportional to the cross-sectional area A of the electrode. Namely: R=Ï·L/A, since the cross-sectional area A and the spacing L of the electrode are both fixed, L/A is a constant, called the conductance constant (indicated by Q), usually Q is fixed and known. When the conductance Sx is measured, the conductivity Kx can be calculated.
Snacks usually refer to the food eaten outside the time point of three meals a day. Under normal circumstances, in people's life, except that three meals a day are called dinner food, the rest are called snacks.
Snacks,Canned Lychee,Canned Peaches,Canned Fruit
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