N-isopropylacrylamide (NIPAM, >99%, Sigma, St. Louis, MO, USA) was recrystallized from n-hexane before use. Furthermore, 2, 2’-Azobisisobutyronitrile (AIBN, 98%) and 4,4’-Azobis(4-cyanovaleric acid) (ACVA, ≥98%) were obtained from Sigma (St. Louis, MO, USA) and recrystallized from methanol prior to use. Stearic acid (>98%) was purchased from TCI America (Tokyo, Japan) and used as received. Additionally, 4-Cyano-4-[(dodecylsulfanylthiocarbonyl)sulfanyl]pentanoic acid (CDP, 97%), dicyclohexylcarbodiimide (DCC, 99%), 4-dimethylaminopyridine (DMAP, 99%), 2-hydroxyethyl methacrylate (HEMA, ≥99%) carbamazepine (CBZ, ≥98%), 1,3,5-trioxane (≥99%), pyrene (98%) and sodium sulphate anhydrous (Na2SO4, 99%) were purchased from Sigma (St. Louis, MO, USA) and used without any further purification. Then 1,4-Dioxane (99%, Fisher Scientific, Waltham, MA, USA) and tetrahydrofuran (THF, ≥99%, Sigma, St. Louis, MO, USA) was purified by being passed through a short alumina column before use. Chloroform-d (99.8 atom %D), dichloromethane (DCM, ≥99.5%) and ethyl acetate (EtOAc, ≥99.5%) were obtained from Sigma (St. Louis, MO, USA), while sodium bicarbonate (NaHCO3, 99.8%) and sodium chloride (NaCl, 99.9%), diethyl ether (≥99%), methanol (99.8%) and hexane (98.5%) were purchased from Fisher Scientific (Waltham, MA, USA).
Sodium sulphate anhydrous na2so4
Manufactured by Merck Group
Sourced in United States
Sodium sulphate anhydrous (Na2SO4) is a white, crystalline inorganic compound. It is a widely used laboratory reagent and is commonly employed as a drying agent, a filler, and a source of sulfate ions in various chemical processes.
Automatically generated - may contain errors
Lab products found in correlation
Hexane, by Thermo Fisher Scientific (1 mentions)
Sodium chloride (nacl), by Thermo Fisher Scientific (1 mentions)
Diethyl ether, by Thermo Fisher Scientific (1 mentions)
Sodium bicarbonate, by Thermo Fisher Scientific (1 mentions)
Methanol, by Thermo Fisher Scientific (1 mentions)
Dicyclohexylcarbodiimide, by Merck Group (1 mentions)
4 dimethylaminopyridine, by Merck Group (1 mentions)
Chloroform d, by Merck Group (1 mentions)
4 cyano 4 dodecylsulfanylthiocarbonyl sulfanyl pentanoic acid, by Merck Group (1 mentions)
N isopropylacrylamide nipam, by Merck Group (1 mentions)
1 4 dioxane, by Thermo Fisher Scientific (1 mentions)
2 2 azobisisobutyronitrile, by Merck Group (1 mentions)
1 3 5 trioxane, by Merck Group (1 mentions)
4 4 azobis 4 cyanovaleric acid, by Merck Group (1 mentions)
Ethyl acetate etoac, by Merck Group (1 mentions)
Nahco3, by Thermo Fisher Scientific (1 mentions)
Tetrahydrofuran thf, by Merck Group (1 mentions)
Dichloromethane, by Merck Group (1 mentions)
Pyrene, by Merck Group (1 mentions)
Carbamazepine, by Merck Group (1 mentions)
2 protocols using sodium sulphate anhydrous na2so4
1
Synthesis and Characterization of Stimuli-Responsive Polymers
2
Determination of Total Hydrocarbons in Sediments
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Total hydrocarbons were extracted from sub-surface sediment following the 3550C EPA (Environmental Protection Agency) procedure. Briefly, a mixture of CH2Cl2:CH3COCH3 (1:1, v/v) was added to sediment samples. The mixture was sonicated for 30 min in ultrasound bath (Branson 1200 Ultrasonic Cleaner, Branson USA). Samples were further shaken at 150 ×g for 30 min, centrifuged for 10 min at 5000 ×g and supernatant was passed through a ceramic column filled with sodium sulphate anhydrous Na2SO4 (Sigma-Aldrich, Milan). Same treatment of pooled and dried sediment was repeated with CH2Cl2 and the obtained extracts were combined and volatilized to dryness. Residues were re-suspended in CH2Cl2 prior to gas chromatography (GC) analysis. All measures were performed using a Master GC DANI Instruments (Development Analytical Instruments), equipped with SSL injector and FID detector. Samples (1 μl) were injected in split less mode at 330 °C. The analytical column was a Restek Rxi-5 Sil MS with Integra-Guard, 30 m × 0.25 mm (ID × 0.25μm film thickness). Helium carrier gas was maintained at a constant flow of 1.5 ml min -1 . Total hydrocarbons were also calculated for each sample (Genovese et al., 2014) . Three subsamples for each station were analyzed.
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