WaterWorks™ Zinc (NCW-480026)
It is a simple dip and read test strip with a precise colour chart on the back of the bottle and the results are shown within 20 seconds. No other reagents or accessories are needed for this test. We use trace amounts of chemicals on our strips which makes them extremely safe and non-hazardous. They are considered as Articles under OSHA and do not require SDS sheets.
Interferences: Similar positive colour development may show up with the presence of Cu+2 (>0.1mg/L), Mn+2 (>5 mg/L), and Fe+2 (>10 mg/L). Most interference from other metals can be overcome by adjusting the pH to 4.0 - 5.5 and adding sufficient Sodium Thiosulfate before test analysis.