There are two natural forms of ionic chromium, the hexavalent ion, Cr (VI) and the trivalent Cr (III). Cr (III) is much less toxic than Cr (VI) and seldom found in potable waters. Cr (VI), however, is toxic to humans ...
Nickel is extensively used in electroplating, the manufacturing of steel, electronic devices, ceramics and colored glasses. It plays a vital role in many processes of applied sciences and fundamental sciences. It ...
เครื่องวัดปริมาณแอมโมเนีย > Ammonia Meter เครื่องวัดปริมาณแอมโมเนีย > เครื่องวัดปริมาณแอมโมเนีย Ammonia Meter > The Hanna Instruments HI 733 is a hand-held colorimeter for testing high ranges of ammonia. It is designed ...
The Hanna Instruments HI 749 is a hand-held colorimeter for testing low ranges of chromium VI. It is designed as an accurate alternative to chemical test kits.