Process for the preparation of ferric chloride from dilute hydrochloric acid, which consists in first of all making a dilute solution of ferrous chloride by reaction with iron and then chlorinating this solution in the presence of recycled ferric chloride and finally in decompressing the solution ...
观察洋葱表皮实验中碘液的配制(The preparation of iodine solution in onion skin experiment was observed) Not only saves time, but also avoids the disadvantages. 1., the preparation of salt dilute iodine solution (1) dissolve 0.2 g of iodine with 95% concentrated alcohol 70 g; (2) dissolve 0.9...
(1) The preparation process of PDA-GO is as follows: Weigh a specific amount of Tris powder (Macklin Biochemical Co., Ltd)and dissolve it in triple-distilled water to prepare a 10 mM solution. Adjust the solution’s pH to 8.5 using dilute hydrochloric acid (HCl) (Aladdin Reagent Co...
The results indicated that the molecular weight of ACEP-Zn decreased significantly after the Zn complex reaction, which might be attributed to the use of dilute hydrochloric acid to regulate pH value during the complex reaction. As hydrochloric acid is a strong acid, part of the polysaccharide de...
Analysis of Metallic Mercury and Mercuric Ion The photosensitive layer was scraped off the plate (96 x 96 mm) after exposure for 50 min, and the mercurous copoly(vinyl alcohol-acrylate) (50-70 mg) was refluxed in 10 ml of dilute sulfuric acid (1 : 20) for 2 hr. Small drops of ...
Foam nickel with thickness of 2 mm was used as the substrate, cleaned by acetone, soaked and degreased in alkaline solution (60 g·L−1NaOH, 15 g·L−1NaPO4, 30 g·L−1Na2CO3and 5 g·L−1Na2SiO3) and then soaked in 10% dilute hydrochloric acid to remove the sur...
Galletti and co workers have recently studied the hydrothermal conversion of biomass materials: poplar saw dust, olive tree pruning and wheat straw to levulinic acid using dilute aqueous hydrochloric acid catalyst at 180–200 °C [4]. In these experiments they have obtained levulinic acid in 12...
the catalyst is filtered and the residual α-methyl-3,4dihydroxyphenylalanine washed from the catalyst with dilute hydrochloric acid. The acidic extracts are combined and made to a pH of 4 with dilute sodium hydroxide. The crystallized α-methyl-3,4-dihydroxyphenylalanine is filtered and the resul...
and slowly added to a toluene/water (5:6) mixture (1,100 mL) with stirring. The organic phase is separated, washed sequentially with dilute hydrochloric acid and water, dried over anhydrous sodium sulfate and concentrated in vacuo to give a brown, viscous oil (44.5 g) which contains 90% ...
After decanting, the chlorinated phase is washed with dilute hydrochloric acid and then with water, before being concentrated under reduced pressure. An analytically pure sample is obtained after purifying on a silica column. In this manner, methyl (R)-2-benzenesulphonyloxy-2(2-chlorophenyl)acetate...