Total amine value

To analy2e fatty amines, both wet and instmmental methods of analysis are used. Wet methods routinely used are total amine value (ASTM Method D2073) combining weight or neutralization equivalent primary, secondary, and tertiary amine content (ASTM Method D2083) moisture, Kad-Fischer (ASTM Method D2072) and iodine value, measure of unsaturation (ASTM Method D2075). These provide important information on physical and chemical characteristics of the amine products used in various appHcation areas (8,76,81). In addition to the ASTM methods available, the American Oil Chemists Society has developed methods of analysis for fatty amines (82). 

Reaction time determined by hydrogen nptake measnrements TAV = total amine value made by the titration of amines to give nitrile conversion ° 2/3 A = the percentage of 2° and 3° amines This catalyst was modified with 1.33 mmol H2CO at rt for 1 h... 

Total Amine Value 192 Density 77F (25C) 7.6 Ibs/gal Flash Point 490F (254C)... 

Product Description Total amine value Min Primary amine value Min Secondary amine value Min Color Gardner, 1963 Max % Moisture... 

Chem. Descrip. N,N -ethylenebisstearamide Uses Dispersant, blending agent antlstat In plastic films Properties Gardner color 5 max. typical median particle size 7-9 micron 99.9% through 325-mesh m.p, 140-145 C flash pt, (COC) 299 C fire pt, (COC) 315 C acid value 8 max total amine value 2 max. 

Color (Gardner) 40 Maximum Melting Point, C 72-76 Acid Value 8.0 Maximum Total Amine Value 10.0 Maximum Performance Features ... 

Because the heavy ethyleneamines are very complex materials, assays by titration in aqueous and nonaqueous media are often performed (151). The result is usually expressed as an amine number or amine value, a measure of the total basic nitrogen content of the product. Titrimetric procedures are also available to define primary, secondary, and tertiary amine content (152). 

ASTM D 2073-92, Standard Test Methods for Total, Primary, Secondary, and Tertiary Amine Values of Fatty Amines, Amidoamines and Diamines by Referee Poten-tiometric Method, ASTM, Philadelphia, PA, 1992. 

While the determination of total lysine is rather straightforward, the determination of free or available lysine is more problematic. In this situation, the term free is meant to imply that the e-amine of the lysine side chain has not reacted with various components of the sample matrix (most commonly carbohydrates via Maillard browning). This is important because reaction of the e-amine can render lysine nutritionally unavailable and the nutritive value for that protein is then diminished if lysine is the limiting amino acid (which is often the situation with soy proteins). While enzymatic digestion in the human gut may not release the modified lysine in a nutritionally available state, often these lysine adducts are labile to the standard acid hydrolysis in 6N HC1 at 110°C. This results in total lysine values that overestimate the amount of nutritionally available lysine. 

The total nitrogen of orange juices was found to increase with the maturity of the fruit and ranged between. 068 to. 120 g per 100 ml (30). The actual protein values obtained by Clements (31) were about 20 percent of the acetone powder. Nearly 30 percent of the alcohol-insoluble solids of juice and about 20 percent of that of vesicular pulp were found to be protein as determined by the Kjeldahl procedure (32). These values are the actual protein that was precipitated by alcohol and are only a fraction of the total protein values usually reported for orange juice (8). The main source of proteins in citrus juice is probably in the form of enzymes and the plastids. At least 47 different enzymes have been reported to occur in citrus fruits (33). Citrus fruits also contain several phenolic amines (34), some of which such as syn-epherine, may have physiological importance (35). 

Then, blends were evaluated at the same amount of CO2 and a temperature of 40°C (which is typically the conditions in the absorber). The total amine blends concentration was kept at the value of 30wt% for all different systems. The results are shown in table 2. Three different amine concentration ration have been realized for the three different amine system (MEA-PZ-H2O, DEA-PZ-H2O... 

Properties Pale yel. solid Gardner 3 max. mild ammoniacal odor sol, in alcohols, chloroform, other hydrocarbons insol. in water equivalent mass 192 dens. 830 kg/m bulk dens. 500 kg/m m.p, 55-65 C flash pt. < 150 C total amine no, 286-319 iodine value 6 max. 

Properties Pale yel. liq./paste Gardner color 4 sol. in alcohols, chloroform, other hydrocarbons dens. 820 kg/m vise. 5 mPa-s m.p. 9-20 C flash pt. > 150 C (COC) iodine value 60 min. total amine no. 320-357 Precaution Wear protective clothing, gloves, safety goggles Duomeen OL [Akzo Nobel Surf. Chem. Akzo Nobel Surf. Chem. AB]... 

Features When used as an emulsifier, REDICOTE 404 must be neutralized with an acid, normally hydrochloric, to a pH of about 1.5-2.5 Properties Brown liq. dens. 950 l /m vise. 430 cP 20 C pour pt. 0 C acid value 0-5 total amine number 310-340 Use Level 0.1-0.5%... 

The ethoxylated ester concentration is obtained by difference. During the titration for assay, a value, in milliequivalents per gram, was obtained for total amine ethoxylate and ester ethoxylate. This value is corrected for the ethoxylated amine content and equivalent... 

This corresponds with MacDiarmid s observations which show that the second redox step is strongly pH-dependent. MacDiarmid further differentiated his redox model to take account of the fact that pure leucoemaraldine with its amine-N is already protonated at pH values 2, and that the totally oxidized pemigraniline with its less basic imine-N can also be protonated. This gives the following (simplified) reaction scheme ... 

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