Industrial Metal Detector with RS232/RS485 on-line Total Nickel Water Quality Monitor Mangenese Accurate Infrared MeasurementIndustrial Metal Detector with RS232/RS485 on-line Total Nickel Water Quality Monitor Mangenese Accurate Infrared Measurement
Price: Product Description Brief description of principle: In an acidic solution, trivalent chromium is oxidized by potassium permanganate to hexavalent chromium, and hexavalent chromium reacts with diphenylcarbazide to form
