2+3

Henan Zhonglan Environmental Protection Engineering Co., Ltd. specializes in: integrated water purification equipment, groundwater defluorination equipment, well water iron and manganese removal equipment, ultrapure water equipment, valveless filters, pure water equipment, water purification equipment, sewage treatment equipment, Reverse osmosis equipment; environmental protection engineering, construction mechanical and electrical installation engineering construction; sales of water treatment equipment accessories and consumables, laboratory instruments, teaching equipment, telephone 18838160815.
English Set as homepage
Key words:
  • Home
  • Technical Information
  • Water quality standard
  • About Zhonglan
  • contact us
  • current position:

    Home > Technical Information

    Water quality--Determination of nitrate nitrogen--phenol disulfonic acid spectrophotometric method

    Source: Author: Time: 2018-03-14 Views: Times

    Water quality--Determination of nitrate nitrogen--phenol disulfonic acid spectrophotometric method

    Water quality-Determination of nitrate-Spectrophotometric method with phenol disulfonic acid

    (Implemented in GB 7480-87 1987-08-01)

    This standard applies to the determination of nitrate nitrogen in drinking water, groundwater and clean water. This method is suitable for the determination of nitrate nitrogen concentration in the range of 0.02 to 2.0 mg / L. When the concentration is higher, fewer samples can be taken for measurement.


    Water quality-Determination of nitrate nitrogen-phenol disulfonic acid spectrophotometric method (GB 7480-87)

    0

    Phone: 0371-63916789 Mobile: 188 3816 0815 QQ: 2473990570 Fax: 0371-55623698 Email: zljituan88@163.com

    Office Address: 910, 9th Floor, Building No. 6-B, West Fourth Ring Road, Zhengshang Road, Zhongyuan District, Zhengzhou City Factory Address: Block C, South Food Machinery Industrial Park, Jinfeng Avenue, Xiping County, Zhumadian, Henan Province

    Overseas Business Department (Pakistan) 00923434039999 008613838581116 Islamabad Office: Pakistan, Islamabad, F7 / 4, 60th Street, 1

    Henan Public Security No. 41010202002010