Compound, cleaning liquid

Cleaning fluid or liquid Compound, cleaning liquid, 3, 8 1760 1993... 

Compounds, cleaning liquid (corrosive) 1760 60 Compressed Gases, toxic, n.o.s. (Inhalation Hazard Zone B) 1955 15... 

COMPOUNDS, cleaning liquid (tlammable) 2016 15 CHEMICAL AMMUNfflON. nonexplosive. 

I. Sodium. Probably the best known active hydrogen remover is sodium. When used outside a vacuum system, for instance as sodium wire to dry solvents, the sodium is little more than a support for a skin of sodium hydroxide. Inside a vacuum system, however, one can prepare films of sodium metal and one can prepare really clean sodium which will give a colourless solution of sodium ethoxide (see Section 5.2.1.). The method of making sodium films for the removal of acidic compounds from liquid reagents will be described and also a very much less well-known method involving sodium vapour and colloidal sodium. 

Products and Uses Extremely useful household chemical. Used for laundry bleach, bath cleansers, tile cleansers, and cleaning liquids. As an antimicrobial agent, bleaching agent, oxidizing agent. Chlorine is used industrially to bleach paper products this process results in highly toxic compounds known as dioxins. 

Cleaning liquids, cleaning compounds, and cleaning fluids remove unwanted materials (soil such as oil, sugars, proteins, dust, lubricants, etc.) from a solid substrate (fabrics and fibrous materials and hard surfaces like glass, metal, and painted surfaces) by bringing the soil into mechanical suspension or colloidal, molecular, or ionic solution in some solvent. The nature of the solvent provides a means of classification. 

Chloroform is a volatile, sweet-tasting liquid that was used for many years as an anesthetic. However, because of its toxicity (it can severely damage the liver, kidneys, and heart) it has been replaced by other compounds. Carbon tetrachloride, also a toxic substance, serves as a cleaning liquid, for it removes grease stains from clothing. Methylene chloride is used as a solvent to decaffeinate coffee and as a paint remover. 

Supercritical fluid extraction (SFE) and Solid Phase Extraction (SPE) are excellent alternatives to traditional extraction methods, with both being used independently for clean-up and/or analyte concentration prior to chromatographic analysis. While SFE has been demonstrated to be an excellent method for extracting organic compounds from solid matrices such as soil and food (36, 37), SPE has been mainly used for diluted liquid samples such as water, biological fluids and samples obtained after-liquid-liquid extraction on solid matrices (38, 39). The coupling of these two techniques (SPE-SFE) turns out to be an interesting method for the quantitative transfer... 

Figure 13,12 Illusti ation of the clean-up method, showing the analysis of an air sample (a) with and (b) without column switching. Details of the analytical conditions are given in the text. Reprinted from Journal of Chromatography, A 697, R R. Kootsti a and H. A. Herbold, Automated solid-phase exti action and coupled-column reversed-phase liquid cltromatogra-phy for the trace-level determination of low-molecular-mass carbonyl compounds in ak , pp. 203-211, copyright 1995, with permission from Elsevier Science.

G. R. van der Hoff, A. C. van Beuzekom, U. A. Th Brinkman, R. A. Baumann and P. van Zoonen, Determination of organochlorine compounds in fatty matrices. Application of rapid off-line normal-phase liquid chromatographic clean-up , J. Chromatogr. 754 487-496 (1996). 

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