Please leave a small amount of air in your vials for Total and Dissolved Phosphorus and COD so they can be homogenized easily before analysis. Fill to the bend in the neck of each vial according to the illustration below. Thank You!

Please leave a small amount of air in your vials for Total and Dissolved Phosphorus and COD so they can be homogenized easily before analysis. Fill to the bend in the neck of each vial according to the illustration below. Thank You!
