Mortar grinding

Place the other vegetable sample in a beaker containing 25 mL of water. Heat the water to boiling and continue to boil for 10 minutes. Pour off and save the water, cut vegetable into small pieces, and transfer to a mortar. Grind with three 25-mL portions of metaphosphoric acid solution as before. Combine all the metaphosphoric acid extracts in a 100-mL volumetric flask. Filter the extract and titrate with DCIP as before. Mix 5.0 mL of the cooking water with 5.0 mL of metaphosphoric acid solution. Titrate with DCIP. 

Saponification Place 10 g of Potassium Hydroxide-Diatomaceous Earth Mixture in a 400-mL mortar. Transfer 5 g of sample, accurately weighed (Ws), into the mortar. Grind the mixture until the sample is uniformly distributed. Add another 10 g of Potassium Hydroxide-Diatomaceous Earth Mixture, and grind to a uniform consistency. Transfer the mixture to a jar. Transfer any residual sample by using the pestle to sweep 5 g of diatomaceous earth along the sides of the mortar and into the jar. Cap the jar securely, and shake until the mixture is uniform. Heat for 20 to 30 min in an oven at 130°. 

Take the still-warm salts out of the oven and place them in a warm mortar. Grind the salts fine. Pour the salts into a vial in an even layer. Pour enough of the essential oil over the salts so that they are just saturated. Seal the vial and place it in an incubator at 40°C. There the salts should remain undisturbed for a week. 

Mix the mercury with an equal amount of native sulfur in a mortar, grinding it together well. The matter will turn black during this process, forming mercury sulfide. Examine the... 

In a small mortar grind 2 g of green or brightly colored fall leaves (don t use ivy or waxy leaves) with 10 mL of ethanol, pour off the ethanol, which serves to break up and dehydrate the plant cells, and grind the leaves successively with three 1-mL portions of dichloromethane that are decanted or withdrawn with a Pasteur pipette and placed in a test tube. The pigments of interest cU e extracted by the dichloromethane. Alternatively, place 0.5 g of carrot paste (baby food) or tomato paste in a test tube, stir and shake the paste with 3 mL of ethanol until the paste has a somewhat dry or fluffy appecu-ance, remove the ethanol, and extract the dehydrated paste with three 1-mL portions of dichloromethane. Stir and shake the plant material with the solvent in order to extract as much of the pigments as possible. 

In a mortar, grind two Extra Strength Excedrin tablets to a very fine powder. The label states that this analgesic contains 250 mg of aspirin, 250 mg of acetaminophen, and 65 mg of caffeine per tablet. Place this powder in a test tube and add to it 7.5 mL of dichloromethane. Warm the mixture briefly and note that a large part of the material does not dissolve. Filter the mixture into another test tube. This can be done by transferring the slurry to a funnel equipped with a piece of filter paper. Use a Pasteur pipette and complete the transfer with a small portion of dichloromethane. This filtrate is Solution 1. 

Grinding the sample to produce a powder. Particle sizes up to 300-500 pm may be acceptable. The grinding modes used for this purpose include mortar grinding. Teflon... 

If any candy remains in the mortar, pour some water from the graduated cylinder into the mortar. Grind the remaiiung candy in the mortar until it dissolves in the water. Pour this solution into the beaker. 

By building their own vibration ball mill, Shayesteh and coworkers obtained 100% conversion in just 12 min at 30 Hz for cross-dehydrogenative coupling (CDC) of 2-naphthol [62]. In comparison, the Toda s mortar grinding and above described method by Rasmussen et al. needed 2 and 1 h, respectively. On operation condition of 30 Hz vibration ball mill gives better performance in comparison to other commonly used methods such as ball mill and mortar and pestle, due to higher mechanical... 

Ball-milling and pestle and mortar grinding have emerged as powerful methods for the development of environmentally benign chemical transformations. Recently, the use of these mechanochemical techniques in asymmetric organocatalysis has increased. Chimni and coworkers " have... 

Freeze tissue in liquid nitrogen in a mortar, grind to a powder with a pestle. Cool the mortar and pestle prior to use with liquid nitrogen, and work quickly so as to avoid thawing of the frozen tissue. 

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