In - house method : T-19-02 based on Standard Method for the Examination of Water and Wastewater APHA, AWWA & WEF 21st ed. 2005, part 5220 C (Closed reflux, Titrimetric method)
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- ซีโอดี 40 4000 mg/dm3
2. น้ำผิวดิน
In - house method : T-19-01 based on Standard Method for the Examination of Water and Wastewater APHA, AWWA & WEF 21st ed. 2005, part 3030 E (Nitric acid digestion)
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