What is PH and How is it measured A Technical Handbook for industry

PH là gì và đo nó như thế nào - Tài liệu kỹ thuật cầm tay trong công nghiệp.
Proper pH control keeps milk from turning sour, makes strawberry jelly gel, and prevents shampoo from stinging your eyes. In plating plants, pH control is used to ensure the luster of chrome on various products from nuts and bolts to toasters and automobile bumpers. The pH of wastewater leaving manufacturing plants and wastewater purification plants, as well as potable water from municipal drinking water plants, must be within a specific pH "window" as set forth by local, state or federal regulatory agencies. This value is typically between 5 and 9 pH, but can vary from area to area.
Other pH applications include:
• Neutralization of effluent in steel, pulp and paper, chemical, and pharmaceutical manufacturing
• Hexavalent chromium destruction
• Cyanide destruction
• Reverse osmosis
• Odor scrubbers
• Pharmaceutical manufacturing
• Chemical and petrochemical manufacturing
• Cooling tower control