Wrist-action shaker

Although there is no official ASTM test to measure the water handling properties of gasoline, there are a number of widely used industry tests. One uses a Waring Blender to simulate high shear (57), whereas another uses a wrist action shaker to simulate mild shear conditions (58). 

Under some circumstances, e.g. the dissolution of a sparingly soluble solid, it may be more advantageous to make use of a mechanical shaker. Various models are available, ranging from wrist action shakers which will accommodate small-to-moderate size flasks, to those equipped with a comparatively powerful electric motor and capable of shaking the contents of large bottles vigorously. 

Latex and solvent were mixed in bottles and the capped bottles were shaken for 10 minutes on a Burrell Wrist-Action Shaker. 

EXDET Test. A dispersant effectiveness test, named EXDET, was developed to address concerns associated with available laboratory dispersant effectiveness test procedures [160]. The EXDET procedure uses standard laboratory equipment (such as a Burrell Wrist-Action shaker) and small volumes of water, oil, and chemical dispersant. Other features include the capabilities to mass balance the dispersed and nondispersed oil and to generate replicate data for statistical analysis. 

Cotterill [119] used the soil extraction method devised by McKone [120] in which a 25g sample of soil was extracted with 50ml of methanol by shaking on a wrist-action shaker for lh. The resulting soil slurry was filtered through a Whatman No. 42 filter-paper. For gas chromatography, a 2ml... 

FIGURE 3 Common devices for mixing and extraction Scientific Industries (Vortex Genie 2), Burrell wrist-action shaker and Branson 8510 sonicator. 

Procedure. A gram of the mineral was preconditioned for 90 minutes with 5cc of a 0.2 kmol/m sodium chloride solution at 75 C on a wrist action shaker. Then a 5cc solution of known surfactant concentration is added and allowed to shake for four hours. Four hours mixing was found to be sufficient to reach equilibrium from adsorption test conducted as a function of mixing time. The... 

For the four herbicides, the soil fraction in the sample bottle was extracted by adding 50 mL of diethyl ether followed by agitation for 15 minutes on a wrist-action shaker. The diethyl ether was decanted and the high concentration samples were extracted three more times with 50 mL of diethyl ether by hand shaking the capped bottles for 2 to 3 minutes. The low concentration samples were extracted two additional times with 25 mL of diethyl ether. 

For the two insecticides, the soil was extracted with 75, 50 and 50 mL of an acetone benzene methanol (1 2 1 by vol.) mixture. The sample bottles were capped and agitated for 60 minutes on a wrist-action shaker for each extraction. The contents of the bot-... 

All middle phase microemulsion and solubilization studies were carried out in 20 ml centrifuge tubes with Teflon screw caps. Experiments were conducted at controlled room temperature of 22°C. Equal volumes of aqueous surfactant solution and oil (10.00 ml each) were placed in the centrifuge tube. The tube was shaken gently on a wrist action shaker for 20 minutes and allowed to stand for at least 12 hours to ensure equilibrium. The volume of each phase was carefully recorded to within 0.01 mis. The surfactant and oil concentrations were quantified in each phase for a few... 

We began the batch squalane extraction studies by mixing 30 mis of the middle phase from the surfactant system 10% SDBS/17% IPA/12.4% NaCl/dodecane (Figure 6) with 30 mis. of squalane. The solutions were mixed for 10 minutes on a wrist action shaker and allowed to separate. Coalescence was rapid and complete in 5 minutes. The squalane rich phase was separated, and both phases were analyzed for dodecane and SDBS by the methods described previously. These results are summarized in Table V. The batch study was encouraging since 98% of the original solubilized dodecane from Figure 6 (12.4% NaCl ) partitioned into squalane. All the surfactant remained in the aqueous phase, as expected. 

Various concentrations (10.00 mL) of Cu2+ or Pb2+ solutions were exposed to 0.0250 g of silica in sealed conical flasks for 16 hours in a wrist action shaker. The slurries were centrifuged, solution aliquots then obtained and analyzed by atomic absorption (AA, Perkin-Elmer 2380). The extent of metal ion adsorption on silica was obtained by subtracting the amount of metal ion present in solution after adsorption from the amount of metal ion in the original solution. 

In batch SPPS (solid-phase peptide synthesis), the resin is contained in a vessel, usually equipped for bottom filtration. After a washing solvent or a reagent is added, the resin is mixed and the solvent or reagent is removed by filtration. Batch synthesizers use a variety of methods to mix the resin the wrist-action shaker, vortex mixing, nitrogen bubbling, or overhead stirring. 

Peptides International Syn-Thor2000 Boc/Fmoc wrist action shaker 0.5-50g 6 Xaa reservoirs... 

Sample preparation Grind yew needles to <3 mm in a blender. Weigh out 3-4 g, add 100 mL MeOH, shake for 16 h on a wrist-action shaker, filter (Whatman 1 or 2 paper), wash the solid with 25 mL MeOH. Evaporate the filtrate to dryness under reduced pressure at... 

Combine the supernatants and evaporate them to drjmess under vacuum, reconstitute the residue in 1 mL MeCN water 2 1, centrifuge at 10000 g, remove the supernatant and add it to 500 p,L water, centrifuge at 10000 g, iiyect a 1 mL aliquot. Urine. Centrifuge at 10000 g, inject an aliquot. Feces. 1 g Homogenized feces -t- 2 mL MeCN, sonicate for 5 min, shake in a wrist action shaker for 20 min, centrifuge at 700 g for 10 min. Remover the supernatant and wash the precipitate twice with 1 mL MeCN water 2 1, combine the supernatants, inject a 500 p.L aliquot. 

Each film was then placed in a scintillation vial and extracted with 2-butanone for 30 minutes on a wrist-action shaker. Films were removed intact from the solvent and dried to constant weight at 60°C in vacuo, then re-weighed to determine weight loss. 

Sample preparation Grind yew needles to <3 mm in a blender. Wei out 3-4 g, add 100 mL MeOH, shake for 16 h on a wrist-action shaker, filter (Whatman 1 or 2 paper), wash the solid with 25 mL MeOH. Evaporate the filtrate to dryness under reduced pressure at 40-43°, reconstitute the residue in 10 mL MeOH and 1 mL water. Condition a 47 mm Empore SPE extraction disk (3M Corp.) with 15 mL ethyl acetate, 15 mL MeOH and 15 mL water. Use a 47 mm polypropylene separator with 10 p.m pore size (Gelman 61757) in front of the extraction disk. Pass 10 mL water and 7 mL crude extract throu the disk, wash with 15 mL water, wash with 15 mL MeOH water 20 80,15 mL MeOHrwater 45 55, elute with 20 mL MeOH. water 80 20, filter (2 p,m) the eluate, inject a 10 p,L aliquot. 

EXDET wrist-action shaker 025 experimental Elxxon... 

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