Urea for industrial use — Determination of nitrogen content — Titrimetric method after distillation

Urea for industrial use — Determination of alkalinity — Titrimetric method

Urea for industrial use — Determination of ash

Urea for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method

Urea for industrial use — Measurement of the pH of a solution of urea of conventional concentration (100 g/l) — Potentiometric method

Urea for industrial use — Measurement of colour in Hazen units (platinum-cobalt scale) of a urea-formaldehyde solution

Urea for industrial use — Determination of the buffer coefficient — Potentiometric method

Urea for industrial use — Measurement of the variation of pH in the presence of formaldehyde — Potentiometric method

Urea for industrial use — Determination of water content — Karl Fischer method

Urea for industrial use — Determination of biuret content — Photometric method

Urea for industrial use — Determination of biuret content — Flame atomic absorption and photometric absorption methods

Caprolactam for industrial use — Determination of absorbance at a wavelength of 290 nm

Caprolactam for industrial use — Determination of absorbance at a wavelength of 290 nm

Caprolactam for industrial use — Determination of crystallizing point

Caprolactam for industrial use — Determination of colour of 50 % aqueous caprolactam solution, expressed in Hazen units (platinum-cobalt scale) — Spectrometric method

Caprolactam for industrial use — Determination of colour of 50 % aqueous caprolactam solution, expressed in Hazen units (platinum-cobalt scale) — Spectrometric method

Caprolactam for industrial use — Determination of permanganate index — Spectrometric method

Plastics — Determination of permanganate absorption number of caprolactam — Spectrometric method

Caprolactam for industrial use — Determination of volatile bases content — Titrimetric method after distillation