Crucible sintered glass

A simple apparatus for sublimation in a stream of air or of inert gas is shown in Fig. II, 45, 3.. d is a two-necked flask equipped with a narrow inlet tube B with stopcock and a wide tube C 12-15 inm. in diameter. The latter is fitted to a sintered glass crucible and the usual adapter and suction flask E. A well-fitting filter paper is placed on the sintered glass filter plate to collect any sublimate carried by the gas stream. 

Ethylmercuric chloride [107-27-7] M 265.1, m 193-194°. Mercuric chloride can be removed by suspending ethylmercuric chloride in hot distilled water, filtering with suction in a sintered-glass crucible and drying. Then crystd from ethanol and sublimed under reduced pressure. It can also be crystd from water. 

Determination of cadmium as quinaldate Discussion. Quinaldic acid or its sodium salt precipitates cadmium quantitatively from acetic (ethanoic) acid or neutral solutions. The precipitate is collected on a sintered-glass crucible, and dried at 125 °C. A determination may be completed in about 90 minutes. For the limitations of the method, see Section 11.11(G). 

Procedure Dissolve 66 g of ceric ammonium sulphate, with the help of gentle heat, in a mixture of 30 ml of sulphuric acid and 500 ml DW. Cool, filter the solution through a fine-porosity sintered-glass crucible, dilute to 1 litre mark in a volumetric flask and mix thoroughly. 

Materials Required Amodiaquine hydrochloride 0.3 g dilute ammonia solution (42.5 ml of strong ammonia solution to 100 ml in water) NO. 4 sintered glass crucible. 

Materials Required Proguanil hydrochloride 0.6 g ammoniacal cupric chloride solution (dissolve 22.5 g of copper (II) chloride in 200 ml of DW and mix with 100 ml of 13.5 M ammonia) NO. 4 sintered-glass crucible mixture of dilute solution of ammonia and DW (1 5). 

Materials Required Benzethonium chloride 0.15 g Chloroform 50 ml bromophenol blue solution (Dissolve with heating 0.2 g of bromophenol blue in 3 ml of 0.1 M NaOH and 10 ml of ethanol (96%). Allow to cool and dilute to 100 ml with ethanol 96%] 50 ml sodium tetraphenyl borate solution (1% w/v in chloroform) 50 ml sintered-glass crucible No 4. 

The precipitates were collected in sintered glass crucibles, washed with alcohol, and dried in vacuum. The weight of silver chloride was 0.3488 g. Authentic samples of TBTC1 (M T Chemicals), when gravimetrically analyzed under identical conditions, gave an assay of 95%. Thus the conversion from TBTA to TBTC1 is 94% in sample 4-4. 

Procedure. Wear PPE - rubber gloves, face shield and lab coat when handling the permanganate-buffer solution. Place the weighed sintered glass crucibles containing the ADF residue one at a time into a stainless steel or polythene tray containing 2-3 cm cold water (a 400 x 320 x 50 mm tray will hold 48... 

The atactic polystyrene is precipitated by dropping the acetone/HCI solution into methanol and it is filtered through a sintered glass crucible the atactic and crystalline portions are dried in vacuum at 50 °C and finally weighed.The X-ray diffraction patterns of the two samples are compared with each other and with that of a polystyrene made by radical polymerization likewise for the IR spectra (see Sects. 2.3.6 and 2.3.9). 

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