Procedures - B

Control

• Fresh samples

• Check Calibration

• pH 4.0 -> (SRB) -> Dist. Water -> (SRB)

  • SRB == Shake, Rinse, Blot

Hypothesis B

• Fresh samples

• Check Calibration

• pH 4.0 -> (variable) -> Water -> SRB

  • Shake, Rinse (twice)
  • Shake only (twice)

• Water was distilled (TDS=0) or tap(TDS=360)

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