The author of 《Fast and stable optical pH sensor materials for oceanographic applications》 were Staudinger, Christoph; Strobl, Martin; Breininger, Johanna; Klimant, Ingo; Borisov, Sergey M.. And the article was published in Sensors and Actuators, B: Chemical in 2019. Safety of 2-Aminopropane-1,3-diol The author mentioned the following in the article:
The study reports preparation and detailed comparison of four new pH sensor materials for seawater measurements. The composition of the sensors is optimized in several iterations to ensure optimal dynamic range, fast response time at low temperatures, low cross-sensitivities to temperature (dpKa/dT ∼ -0.013 pH units/K) and negligible cross sensitivity to ionic strength above salinity 15 PSU. The first generation (material “”pH-1′′) utilizes a pH indicator which is phys. entrapped into a polyurethane hydrogel. This material shows satisfactory performance only at comparably high temperatures with response times being extremely long at low temperatures (t95 > 2 h at 5 °C). The three other materials utilize cross-linked hydrophilic polymers based on poly(acryloylmorpholine) with indicator dye covalently coupled to the polymer. Moreover, the last two generations (“”pH-3′′ and “”pH-4′′) showed no drift over 54 days at 10 °C and only a drift of 0.003 pH units/day at 25 °C. The material of the fourth generation “”pH-4′′ explores a novel approach of covalent coupling via B-O linkage and is characterized by low synthetic effort and the pKa value optimal for seawater measurements (8.05 at 20 °C). Importantly, all new sensor materials are spectrally compatible to a recently presented seawater optode system for combined pH, pO2 and pCO2 measurements which facilitates their application in marine environment. In the experiment, the researchers used 2-Aminopropane-1,3-diol(cas: 534-03-2Safety of 2-Aminopropane-1,3-diol)
2-Aminopropane-1,3-diol(cas: 534-03-2) belongs to anime. Many important products require amines as part of their syntheses. Methylamine is utilized in the production of the analgesic meperidine (trade name Demerol) and the photographic developer Metol (trademark), and dimethylamine is used in the synthesis of the antihistamine diphenhydramine (trade name Benadryl), the solvent dimethylformamide (DMF), and the rocket propellant 1,1-dimethylhydrazine. The synthesis of the insect repellent N,N-diethyl-m-toluamide (DEET) incorporates diethylamine while that of the synthetic fibre Kevlar requires aromatic amines.Safety of 2-Aminopropane-1,3-diol
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