Hanna-instruments HI 83214 Manual do Utilizador descarregar pdf (Página 58)

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

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 71 72

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Hanna-instruments HI 83214 Manual do Utilizador Página 58