Amber glass

As shown in Table 10.1, the solubility of the drug is higher in acidic aqueous media and in methanol compared to the other media listed. Several HPLC vial types were evaluated, including borosilicate glass, amber glass, silanized glass, and polypropylene HPLC vials. Sample solutions were prepared and aliquots were transferred to the vials for analysis. Six sample solutions in each diluent were analyzed per type of vial. Experiments were conducted such that the residence time for the sample solution in each vial type was approximately the same. 

Borosilicate glass Amber glass A Silanized glass x Polypropylene... 

Borosilicate (Pyrex) Common glass Common glass amber Quartz [75]... 

Paper, filter, 11 cm, fast 1/S 1 Pipet, 10 mL 1 Pipet, 25 mL 1 Plate, glass, amber or yellow 1 Plate, titrating plate, 15 x 15 cm... 

Singapore with a 2 1 glass amber bottle inserted in a stainless-steel sampling deviee. The SML samples (approximately 1 1) were collected simultaneously using the glass plate technique (Harvey and Burzell 1972) and stored in an amber glass eontainer. Eight samples were collected for SSW and SML, respectively. 

Storage 6 mos. shelf life in stainless steel tanks, amber glass, amber polyethylene, or baked phenolic lined containers do not expose to temps. 

Toxicology May cause severe skin and eye injury TSCA listed Storage 1 yr. shelf life in stainless steel tanks, amber glass, amber polyethylene, or baked phenolic lined containers do not expose to temps. > 100 F for prolonged periods, or to direct sunlight Ebecryl 81 [UCBChems.]... 

Organic toxic chemicals 11 or 41 glass (amber) bottles with cap lined with polytetrafluoroethylene (PTFE) Rinse three times with tap water, once with chromic acid, three times with organic free water, twice with washing acetone, twice with pesticide grade hexane, and dry the uncapped bottle In a hot air oven at 360°C for at least 1 h... 

Urea 11 glass (amber) bottle Same as for organic toxic chemicals... 

Keep a coil of copper wire (prepared by winding copper wire round a glass tube) or a little silver powder in the bottle, which should be of brown or amber glass the methyl iodide will remain colourless indefinitely. Ethyl iodide may sometimes give more satis factory results. 

Table 8. Typical Batch Mixture for Amber Soda—Lime Container Glass ...

Used primarily to reduce the Fe202 to FeO to give the characteristic amber color, although the redox state of the glass melt also influences the fining... 

AH mercury compounds should be stored in amber botties or otherwise protected from light. In manufacture, glass-lined equipment is preferred, although stainless steel may be used. Stainless steel may cause some discoloration at high temperatures if concentrated acetic acid is used. 

Containers. The USPXXIII—NFXVIII Hsts container requinements such as weH-closed, tight, or light-resistant. Most containers ate light-resistant (amber) glass or plastic. The latter is break-resistant and lightweight, which reduces shipping costs and increases safety. 

Thermal neutron activation analysis has been used for archeological samples, such as amber, coins, ceramics, and glass biological samples and forensic samples (see Forensic chemistry) as weU as human tissues, including bile, blood, bone, teeth, and urine laboratory animals geological samples, such as meteorites and ores and a variety of industrial products (166). 

The solvent is then evaporated, and the unconverted sterol is recovered by precipitation from an appropriate solvent, eg, alcohol. The recovered sterol is reused in subsequent irradiations. The solvent is then evaporated to yield vitamin D resin. The resin is a pale yeUow-to-amber oil that flows freely when hot and becomes a brittie glass when cold the activity of commercial resin is 20 30 x 10 lU/g. The resin is formulated without further purification for use in animal feeds. Vitamin D can be crystallized to give the USP product from a mixture of hydrocarbon solvent and ahphatic nitrile, eg, benzene and acetonitrile, or from methyl formate (100,101). Chemical complexation has also been used for purification. 

It readUy oxidises to anisic acid, melting at 184°, so that it should be kept in amber glass, well-stoppered bottles, in order to prevent oxidation. It forms a semi-carbazone melting at 203° to 204°, and two oximes, one melting at 63° and the other at 132°. 

English physician William Gilbert discovers that materials like glass, sulfur, and diamonds behave just like amber. He calls these materials electrics, which means amber in Latin. 

In many cases the analytical grade material may be replaced by pure recrystallised silver nitrate, but in that case it is advisable to standardise the solution against sodium chloride. Solutions of silver nitrate should be protected from light and are best stored in amber-coloured glass bottles. 

Iron is associated with silica sand, usually as a light surface stain on the grains. Amber glass develops ionic color centers or complexes of Fe-S-C added to the batch as iron sulfide and powdered anthracite. Although the Fe content be four or five times that shown in the example in Table I, it appears to be bound in the complex so that no greater extraction occurs with the S and C. Titanium is associated with sand as... 

Steam condensate samples should be cooled in a stainless steel sample cooler. Samples should be run for 5 to 10 minutes before being collected in a 100-ml amber glass jar with a Teflon lid. The jar should be filled completely with no air space, but without over flowing. The cap should be tight, taped if necessary, and the sample kept cool prior to laboratory analysis. 

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