German standard methods for the analysis of water, waste water and sludge; Sludge and sediments (group S); Determination of pH value in sludge and sediments (S 5)— 4 стр.
German standard methods for the examination of water, waste water and sludge - Parameters characterizing effects and substances (group H) - Part 7: Determination of acid and base-neutralizing capacities (H 7)— 28 стр.
German standard methods for the examination of water, waste water and sludge - General measures of effects and substances (group H) - Part 7: Determination of acid and base capacity (H 7)— 27 стр.
German standard methods for the examination of water, waste water and sludge - Physical and physico-chemical characteristics (group C) - Part 5: Determination of pH value (C 5)— 24 стр.
pH-measurement - pH-measurement of aqueous solutions with pH measuring chains with pH glass electrodes and evaluation of measurement uncertainty— 16 стр.