After obtaining pure water, we need to test its pH value to verify its quality. However, we also encounter many difficulties during the testing process, such as what equipment can be used for testing?

In water quality inspection and measurement, a nine column pH colorimeter is generally used, while a higher standard is to use acidity meters of various models and specifications. If the precision meets the requirements and also complies with GB/T5750-2006 "Standard Test Methods for Drinking Water", it can be used in the field of power supply, environmental protection, health supervision, or intermediary company testing organizations for water quality inspection.

The low ionization degree and lack of buffering agent in pure water samples pose a challenge for pH measurement! This element can cause conditions such as reading errors, delayed responses, and drift. The application of OrionROSS pH level meets the standards of pure water in the US Pharmacopoeia and the pH measurement method in the US Pharmacopoeia (791), promoting more stable, accurate, and precise pH measurement.

Pure water is a high-quality conductor and insulator, making it difficult to turn on or off the measuring level of a pH meter and the reference electrode when measuring pH values. That creates a very high resistor in the power supply circuit of the measurement level, which will increase the noise of the measured electronic signal, slow down the response of the electrical level, and cause a double layer of electrostatic induction. This type of electrostatic induction double layer is common when pure water flows through plastic pipes. The static electric field it causes will cause the measured resistor to be larger than the specific value, resulting in incorrect information on the measured pH value data.

Measuring the pH value of ultrapure water requires a unique standard. Due to its unique characteristics, ultrapure water is known as the world's most powerful organic solvent. The chemical formula for water is one oxygen molecule plus two hydrogen atoms, colorless and odorless. Because pure water can dissolve all chemical substances it touches, its definite purity is unlikely to be maintained. Because ultrapure water lacks all buffering capabilities (i.e., it maintains its own pH value while dissolving other chemicals), even the slightest environmental pollution can alter its pH value.

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