ISO 3704:1976
$13.00
Soufre à usage industriel — Détermination de l’acidité — Méthode titrimétrique
| Published By | Publication Date | Number of Pages |
| ISO | 1976-09 | 4 |
Applicable to products having acidities, expressed as H2 SO4 , equal to or more than 0.01 % (m/m). Describes the extraction of acidic substances with a mixture of water and propan-2-ol (isopropyl alcohol). Titration of the extract with standard volumetric sodium hydroxide solution in the presence of phenolphthalein as indicator. The preparation of the sample from the laboratory sample is carried out by grinding a sufficient quantity of the undried material until it passes through a sieve of nominal mesh of 250 m.
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