Hanna-instruments HI 83214 Manual de usuario Pagina 58

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Note: For accurate measurements
1) wash glassware only with phosphate-free detergents
2) clean all glassware with 1 : 1 hydrochloric acid solution and rinse with deionized water.
INTERFERENCES
Interference may be caused by:
Arsenate at any level
Silica above 50 mg/L
Sulfide above 90 mg/L.
Turbidity and suspended matter in large amounts may cause interference because the strongly acidic
reaction conditions may dissolve suspended matter or cause desorption of phosphates from particles. Before
measurement, turbidity or suspended matter should be removed by treatment with active carbon and by
prior filtration.
Phosphorus, Total
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