Free chlorine reacts with ammonium ions and organic compounds to form chlorine compounds resulting in diminished disinfecting capabilities compared with free chlorine. These chlorine compounds together with chloramines form combined chlorine. Combined chlorine and excess free chlorine together result in total chlorine. While free chlorine has a much higher disinfectant potential, combined chlorine has a much higher stability and has a lesser volatility. There should be sufficient levels of unreacted free chlorine for adequate disinfection, but not so much as to become harmful.
Order Information:
HI 3887 test kit comes with color comparison cubes (2), 20 mL reagent 1, 15 mL reagent 2, 25 mL HI 3881-0 pH 6.0-8.5 reagent
Specification :
| Method | Colorimetric | |
| Range | Cl²: 0.0-2.5 mg/L pH: 6.0-8.5 pH |
|
| Smallest Increment | Cl²: 0.5 mg/L pH: 0.5 pH |
|
| Chemical Method | DPD pH indicator |
|
| Number of Tests | Cl²: approx. 50 pH: 100 |
|
| Weight | 280 g |
HI4016-02 ISE 100 mg/L (ppm) Sodium Std , 500 ml Bottle
เครื่องวัดปริมาณแอมโมเนีย ช่วงต่ำ รุ่น HI700
FC220B - pH Elektrode
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น้ำยามาตรฐานสอบเทียบ ค่ามาตรฐานความเค็ม
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HI4104 - Calcium ISE, Polymer membrane combination
HI3847 CTK Copper
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เครื่องวัดค่าเหล็ก รุ่น HI721
HI935005 K-Type Handheld-Thermometer - 1-Channel
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HI76313 Platinum, four ring Conductivity/TDS probe
HI723 Checker HC ® - Chromium VI, HR
HI70032C - 1382 mg/l (ppm) TDS@25°C Cert. - 25x20ml
CTK Härte Gesamt 

