응용 프로그램 온라인 ph 미터 in 초순수 물
Not only the the conductive medium in water is almost completely removed, but also the undissociated colloidal substances, gases and organic substances in water are removed to a very low level. The resistivity is greater than 18 mω * cm, or close to the limit value of 18.3 mω * cm.
왜냐하면 초순수 물 가지고 그것 독특한 특성, it is very difficult to measure ph value by online ph meter. In practice, it is difficult to obtain repetitive and stable measurement results in samples with low ionic strength. Low ion samples, that is, low alkalinity, low ionic strength, or low conductivity (conductivity is generally 0.056-10) and high impedance, such as deionized water. 왜냐하면 의 의 변화 접합 잠재성 인 참조 접합부, 다른 pH 값 의지 수 언제 탈이온화 물 is measured, even if it is a new, sealed electrode, and it will be well corrected in buffered standard solution.
1. 왜 할 당신 필요 온라인 ph 미터 to 측정 pH 값 순수 물 % 3f
In the production process of pure water, measuring pure water can be used as an indicator of process pollution. 언제 공기 또는 이산화탄소 침입 the pure water production or distribution system, it will lead to pH drift.
2. 방법 선택 온라인 ph 미터 PH 전극 % 3f
확장 브리지 전극 is 리필 가능 및 특수 made of low impedance glass. A circulating reference junction has a relatively high circulation rate, which reduces the junction potential. The sealed electrode, usually filled with gel, has a great advantage of long life because of its very slow leakage rate of reference solution. 그러나, the faster leakage rate is very suitable for ultra-pure water because the pH potential 할 수 be quickly stabilized.
