HACH PCII 游离余氯测试试剂包 P/N.21055-69(2105569) DPD Free Chlorine Reagent, 10 mL Sample, Powder Pillows, PK/100 • DPD Method, Free Chlorine Reagent Powder Pillows Pack of 100 • USEPA accepted for reporting drinking water analysis using Hach Method 8021 • Sample Size: 10 mL • Range: up to 2.00 mg/L • For best results use with a Hach colorimeter or spectrophotometer. • Backed by over 20 years of DPD experience! HACH PCII 游离余氯测试试剂包 P/N.21055-69(2105569) 产地：美国(USA) 库存状态：现货(Spot) HACH 封装型差分ORP探 p/n.2028R0
