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CIE NORD AFRICAINE de l HYPERP
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CIE NORD AFRICAINE de l HYPERP
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G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
G01N31/221—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating pH value
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FR1069382D1953-01-021953-01-02Procédé et dispositif pour la détermination rapide des caractéristiques chimiques d'une terre arable
ExpiredFR1069382A
(fr)