Physical Chemistry

New PDF release: Analysis of Surfactants (Surfactant Science Series)

By Thomas M. Schmitt

ISBN-10: 0585412332

ISBN-13: 9780585412337

ISBN-10: 0824704495

ISBN-13: 9780824704490

Within the culture of the preferred first version, research of Surfactants, moment version deals a accomplished and useful account of study equipment for deciding on and realizing commercially vital surfactants-individually and in compounds. Combining an entire evaluation of the literature with various evaluate strategies and the necessities for advertisement items, this beneficial reference explores the major levels and newest advancements for surfactant purposes. This version has been completely accelerated and contours new sections on capillary electrophoresis, ether carboxylates, and ester quats. it's also extra globally obtainable with overseas language citations and SI units.Containing over 2400 references, drawings, tables, and equations, research of Surfactants, moment version is an prompt reference for actual, floor, colloid, and oil chemists; analytical, examine, and caliber insurance chemists operating within the cleaning soap and detergent, prescribed drugs, and beauty industries; regulatory and foodstuff scientists; and upper-level undergraduate and graduate scholars in those disciplines.

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Extra info for Analysis of Surfactants (Surfactant Science Series)

Sample text

Wash the apparatus several times with a total volume of 450 mL methanol. Evaporate the eluate using a rotary evaporator on a steam bath until a constant weight is obtained. The residue is the unsulfated material. Note: If unfamiliar with the particular product, check the residue for sulfated material by two-phase titration for anionic surfactant. The value for alcohol ethoxylate may be corrected for any polyethylene glycol present by analyzing the residue by TLC or one of the other methods given in Section II of Chapter 2.

1. Total Inorganic Salts An accurate value for total inorganic salts can be obtained by weighing that portion of the sample insoluble in alcohol. The following procedure specifies use of isopropanol. ASTM methods D1568 and D1570 specify ethanol (6,7). Procedure: Gravimetric Method for Determination of Total Inorganic Salts in Anionic Surfactants (Alcohol Insoluble Matter) Dissolve an accurately weighed quantity of sample of about 10 g in 200 mL anhydrous 2-PrOH in a 400-mL beaker. Boil for 5 min with stirring.

The alkylbenzenes are analyzed by gas chromatography on a 25 m SE-54 column, using flame ionization detection. The column temperature is raised from 50eC to 1202C at 30eC/min, then to 220eC at 32C/min. 6 x 150 mm, a mobile phase of 94:6 MeOH/H2O at 1 mL/min, and both refractive index and UV detectors. The RI detector is thermostatted at 352C, while the UV detector is used at 220 nm. In the normal mode of operation, LAS is eluted immediately, followed by unsulfonated material in order of chain length, followed by sulfones over the range 10-35 min.

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Analysis of Surfactants (Surfactant Science Series) by Thomas M. Schmitt


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