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Topic: Iodine Value

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	lye table
		the iodine value is an expression of the degree of unsaturation of a fat measured by determining the amount of iodine which will react with a natural or processed fat under prescribed conditions.
		iodine values are typically listed as a range, however, for the purpose of calculations, use the average.
		the [estimated] ins value is calculated by subtracting the iodine value from the sap value.
	home.earthlink.net /~skinesscentuals/LyeTable.htm (999 words)

	formulatingsoap (Site not responding. Last check: 2007-10-18)
		Iodine value is an indication of the soap's hardness given the oils chosen.
		Iodine values are typically listed as a range, however, for my calculations I selected the average.
		Now that we know that our bar is balanced (INS value close to 160) and that we have a hard bar (iodine value less than 55) we can calculate the amount of sodium hydroxide that will be necessary to saponify the oils that we have chosen.
	www.geocities.com /toiletrytutorials/formulatingsoap.html (567 words)

	Iodine - Supplements
		Iodine is a trace mineral that is primarily concentrated in the thyroid gland.
		Because iodine is needed for synthesis of thyroxin (one of the thyroid hormones involved in regulating metabolic rate), proper iodine intake is required for optimal function of the thyroid gland.
		Iodine is generally considered safe up to levels of about 1-2 milligrams (about 10-15 times the amount that we actually need).
	www.supplementwatch.com /supatoz/supplement.asp?supplementId=175 (546 words)

	EUROFINS - The bioanalytical company (Site not responding. Last check: 2007-10-18)
		Iodine Value (IV) is the grams of iodine absorbed by 100 grams of fat.
		Iodine Value may also be calculated from a fatty acid composition as its value is closely related to the number of double bonds present in the fat.
		The peroxide value test is used to monitor oxidation after the sample is stressed under controlled conditions for a long time or until a specific peroxide value is achieved.
	www.wtlabs.com /services/food/lipids/iodine.asp (535 words)

	MATERIA OLEOCHEMICALS - Mar del Plata - Buenos Aires - Argentina (Site not responding. Last check: 2007-10-18)
		Acid Value: The acid value is the number of milligrams of potassium hydroxide (KOH) necessary to neutralize the free acids in 1 gram of sample.
		Iodine Value: The iodine value is a measure of the unsaturation of the fatty acids, and is expressed in terms of the number of centigrams of iodine absorbed per gram of sample (% iodine absorbed).
		Saponification Value: The saponification value is the amount of alkali necessary to saponify a definite quantity of the sample.
	www.materiaoleochemicals.com /eng/metodos.html (344 words)

	Identification of Guayule Regions in Northern Mexico, Based on Rubber Yield and Coproducts Quality
		Iodine value was determined because the resin might be used for varnish and adhesives (Belmares et al.
		The results for dry weight, percent rubber and percent resin, iodine value and protein content in the bagasse are shown in Table 2.
		Iodine value is an indicator of the concentration of these compounds, but it was not possible to differentiate between them with this technique.
	www.hort.purdue.edu /newcrop/proceedings1996/v3-336.html (1713 words)

	ANIMAL - Online Information article about ANIMAL (Site not responding. Last check: 2007-10-18)
		This value is indispensable for judging the purity of a butter.
		This indicates the percentage of iodine absorbed by an oil or fat when the latter is dissolved in chloroform or carbon tetrachloride, and treated with an accurately measured amount of free iodine supplied in the form of iodine chloride.
		The unsaturated fatty acids which occur chiefly in oils and fats are oleic acid, iodine value 90.07; erucic acid, iodine value 75.15; linolic acid, iodine value 181.42; linolenic acid, iodine value 274.1; and clupanodonic acid, iodine value 367.7.
	encyclopedia.jrank.org /ANC_APO/ANIMAL.html (7679 words)

	Untitled (Site not responding. Last check: 2007-10-18)
		The iodine value of a substance is defined as the weight of halogens expressed as iodine absorbed by 100 parts by weight of the substance.
		The iodine value was determined by the Wijs' method described by IFFO (1998) in which the test sample was dissolved in a solvent and Wijs' reagent added.
		The acid value of the oil samples was determined by dissolving 2g of each sample in 2ml of neutral alcohol in a measuring flask to obtain a solution, which was titrated with 0.1M sodium hydroxide in triplicate, using two drops of phenolphthalein as an indicator (Paquot, 1979).
	www.dmt.canberra.edu.au /IRPS/Archives/vol17no2/paper.html (1681 words)

	Stability of iodine in iodized salt used for correction of iodine-deficiency disorders. II
		The iodine content was calculated using a calibration curve established by a series of spiked samples that covered the range from 5 to 250 mg of iodine per kilogram of salt.
		Iodine losses over six months of storage ranged up to 100%, indicating that within the 12-month trial period, essentially all of the iodine added to the sample disappeared from high-density polyethylene bags, which are effectively open to the atmosphere.
		Although the loss of iodine cannot be clearly correlated with any specific impurity on the basis of the present study, it is clear that the use of highly purified salt would improve the stability of iodine in most cases.
	www.unu.edu /unupress/food/V193e/ch06.htm (4169 words)

	Quality of 2000 Western Canadian Flaxseed - Harvest and export quality data - Canadian Grain Commission
		The average iodine value of the oil is 194 units.
		The average iodine value decreased by five units in Manitoba and by one unit and Saskatchewan samples.
		Oils with iodine values greater than 188 units are desired by the coatings industry for products such as paints, varnishes and inks, while oils with iodine values around 183 units are preferred by the linoleum industry.
	www.grainscanada.gc.ca /Quality/Flax/2000/flax00hs08-e.htm (278 words)

	Iodine Value Analysis
		Iodine value (IV) is a measure of the total number of double bonds present in fats and oils.
		It is generally expressed in terms of "number of grams of iodine that will react with the double bonds in 100 grams of fats or oils".
		The liberated iodine is then titrated with sodium thiosulfate, using a standard starch solution as the indicator.
	www.brukeroptics.com /foodquality/iodine_value.html (353 words)

	IMPERIAL INDUSTRIAL CHEMICALS THAILAND
		The acid value is the number of milligrams of potassium hydroxide necessary to neutralize the free acids in 1 gram of sample.
		The saponification value is the amount of alkali necessary to saponify a definite quantity of the sample.
		The iodine value is a measure of the unsaturation of fats and oils and is expressed in terms of the number of centrigrams of iodine absorbed per gram of sample (% iodine absorbed).
	www.iic.co.th /products/definition.htm (182 words)

	Stability of BioDiesel and the 'Iodine Value'
		The Iodine Value is not determined by measuring the stability of the fuel, rather it is determined by measuring the number of double bonds in the mixture of fatty acid chains in the fuel by introducing iodine into 100 grams of the sample under test and measuring how many grams of that iodine are absorbed.
		Iodine absorption occurs at double bond positions - thus a higher IV number indicates a higher quantity of double bonds in the sample.
		The commonly used measurement for this property, Iodine Value, should be reasonably understood as only a rough guide to a process that is better understood by examining the chemical makeup and breakdown process involved.
	www.brevardbiodiesel.com /iv.html (1485 words)

	Chapters 6 & 7
		The degree of unsaturation of a fat, i.e., the number of double bonds present, normally is expressed in terms of the iodine value of the fat.
		Iodine value is the number of grams of iodine which will react with the double bonds in 100 grams of fat and may be calculated from the fatty acid composition obtained by gas chromatography.
		The average iodine value of unhydrogenated soybean oil is generally in the 125-140 range.
	www.iseo.org /ffo_6-7.htm (3172 words)

	Castor Oil as Biodiesel & Biofuel - Info, Reference, WWW Resources on Castoroil as Bio-fuel, Bio-diesel
		Iodine Value (IV) - Iodine Value (IV) is a value of the amount of iodine, measured in grams, absorbed by 100 grams of a given oil.
		Iodine value (or Iodine number) is commonly used as a measure of the chemical stability properties of different biodiesel fuels against such oxidation as described above.
		The Iodine value is determined by measuring the number of double bonds in the mixture of fatty acid chains in the fuel by introducing iodine into 100 grams of the sample under test and measuring how many grams of that iodine are absorbed.
	www.castoroil.in /uses/fuel/castor_oil_fuel.html (3662 words)

	ARS \| Publication request: The Iodine Value and Biodiesel
		The iodine value has been related to various biodiesel fuel properties including cold flow, oxidative stability, and formation of engine deposits.
		However, the use of the iodine value suffers from several significant disadvantages, which are related to its unsatisfactory specificity in taking fatty acid structure and composition of mixtures into account.
		The development of such an index could have implications for the use of the iodine value in fatty acid chemistry in general.
	ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=109153 (175 words)

	Gatlin et al., June 2002 (Site not responding. Last check: 2007-10-18)
		Experiment 1 was designed to establish the rate of decline for linoleic acid and iodine value of pork fat during the late fattening phase following a dietary reduction.
		These results indicate that reduction of dietary PUFA co ntent had the desired effect of lowering 18:2 content and iodine value of pork fat and that significant alterations could be elicited in as little as 6 to 8 wk of feeding.
		The reduction of dietary linoleic acid resulted in a 2 iodine value unit decrease per week, and this rate may likely be increased with supplementation of an even more saturated fat source and(or) lengthening the period in which the fat source is fed, especially in pigs with a backfat depth of < 18 mm.
	www.asas.org /jas/abs/2002/a0261606.htm (488 words)

	The usefulness of Iodine
		Because the cells making up this gland have an affinity for iodine, during this 17-minute passage the gland's secretion of iodine kills weak germs that may have gained entry into the blood through an injury to the skin, the lining of nose or throat, or through absorption of food from the digestive tract.
		I observed further with reference to a ration supplement high in iodine value that when it was used, the bacterial count of the milk went down; when iodine was dis-continued, the count went up but could be driven down again immediately with resumption of the iodine.
		With the aid of iodine and vinegar during here growing years her human motor was brought under control and she developed into a normal girl.
	www.jcrows.com /iodine.html (6642 words)

	IMPERIAL INDUSTRIAL CHEMICALS THAILAND
		Dissolve 13.0 g of iodine in 1 liter of glacial acetic acid.
		When the iodine value is determined on materials having conjugated Systems, the result is not a measure of total unsaturation, but rather is an empirical value indicative of the amount of unsaturation present.
		When the iodine value is required on fatty acids, the preparation and separation are performed as directed in AOCS Official Method Cd 6-38.
	www.iic.co.th /products/iodine.htm (1817 words)

	D5768-02 Standard Test Method for Determination of Iodine Value of Tall Oil Fatty Acids
		1.2 Iodine value is a measure of the unsaturation of oils and fatty acids and is expressed in terms of the number of centigrams of iodine per gram of sample (weight percent of absorbed iodine).
		1.3 When this test method is used to determine the iodine value of fatty acids having conjugated systems, the result is not a measure of total unsaturated, but rather is an empirical value that affords a comparison of unsaturation.
		It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
	www.astm.org /DATABASE.CART/PAGES/D5768.htm (275 words)

	Merck KGaA - Iodine colour value in clear solutions - (Site not responding. Last check: 2007-10-18)
		The measurement of the iodine colour value is related to a standard of dissolved, elementary iodine in water.
		According to DIN 6162A (1981) this colorimetric variant expresses how many milligrams of iodine per 100 ml of sample correspond with the coloration.
		In a 1-l volumetric flask dissolve 1000 mg of iodine resublimed GR and 10 g of potassium iodide GR in 200 ml of water GR.
	www.merck.de /servlet/PB/menu/1169040/1169040.html (259 words)

	Hydrogenated dietary fat improves pork quality of pigs from two lean genotypes -- Gatlin et al. 81 (8): 1989 -- Journal ...
		iodine value of dietary fat was reduced, belly thickness increased
		iodine value declined from 80 to 20 (linear and quadratic effect;
		as iodine value decreased from 80 to 20, paralleling dietary
	jas.fass.org /cgi/content/abstract/81/8/1989 (435 words)

	Greasecar Vegetable Fuel Systems
		The iodine value measures how unsaturated the oil is, chemically speaking this is the the amount of double bonds the fatty acids in the oil have).
		The higher the iodine value the easier the oil can polymerize and gum up the engine.
		The advantage of using animal fat is that it has a very low iodine value and, at least in theory should not gum up as easily.
	www.greasecar.com /forum_post.cfm?frmpostID=12640 (552 words)

	High-Pressure PVT Behavior of Natural Fats and Oils, Trilaurin, Triolein, and n-Tridecane from 303 K to 353 K from ...
		In this work, we report on the PVT behavior of beef shank, beef tallow, coconut, palm, and palm kernel fats and castor, menhaden, linseed, olive, perilla, safflower, sesame, and soybean oils, each of which was characterized by a fatty acid distribution, iodine value, and saponification value.
		At a given temperature and pressure, the specific volume of the oils decreased with increasing iodine value.
		These parameters were generalized in terms of measurable oil properties, saponification value, and iodine value.
	pubs.acs.org /cgi-bin/abstract.cgi/jceaax/1996/41/i05/abs/je960006x.html (340 words)

	Nottingham Distribution Products - Oils and Specialty Oils
		Iodine value 8-12 Peroxide value <5 Softening point 22-26
		Iodine value 82-92 Saponification value 189-195 Pour point 18
		Iodine value 90-106 Peroxide value <1 Free Fatty Acid <0.05% (Oleic)
	www.ppiatlanta.com /pds-oils.html (101 words)

	Triglycerides (Site not responding. Last check: 2007-10-18)
		Saponification Value: A measure of the molar concentration of ester functions.
		The grams of iodine consumed by 100 grams of triglyceride.
		In practice ICl is used, since iodine does not add completely to double bonds.
	www.cem.msu.edu /~reusch/VirtTxtJml/Questions/NatProd/triglyc2.htm (139 words)

	Vincentz F o r m u l a t i o n C e n t e r
		I want to know how the iodine value of alkyd resins based on drying/semi drying oils can be determined(Practical method).
		The iodine value determination is used to ascertain the extent to which the bonds of the product in question can be regarded as unsaturated.
		It provides relatively exact values mainly with alkyd resins not containing a very large proportion of conjugated double bonds, but otherwise the results serve more as a guide.
	www.coatings.de /fcforum/forum_quest.cfm?nr=949 (286 words)

	D1959-97 Standard Test Method for Iodine Value of Drying Oils and Fatty Acids (Withdrawn 2006)
		This test method covers the Wijs procedure for determination of unsaturation (iodine value) in drying oils.
		Formerly under the jurisdiction of Committee D01 on Paint and Related Coatings, Materials and Applications, this test method was withdrawn in February 2006 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
		1.2 When the iodine value is determined on oils or fatty acids having conjugated systems, the result is not a measure of total unsaturation, but rather is an empirical value that affords a comparison of total unsaturation.
	www.astm.org /DATABASE.CART/REDLINE_PAGES/D1959.htm (295 words)

	Chemical Compound Outline (Part I)
		Another valuable plant gum is gum arabic, obtained from the spiny, shrubby Acacia senegal of northeastern Africa.
		The degree of unsaturation is measured by allowing iodine to combine with a standard amount of a particular oil.
		Iodine ions are incorporated into the oil's fatty acid chains at positions where there were double bonds.
	waynesword.palomar.edu /chemid1.htm (15712 words)

	Bioline International Official Site (site up-dated regularly)
		The process is accelerated by high temperature, ultraviolet light and some divalent metals (3). Hydrolytic rancidity occurring mainly in oil extracted with water is an enzyme catalysed reaction in which fats in the presence of water are hydrolysed to give glycerol (a trihydric alcohol) and free fatty acids (3).
		The percentage free fatty acid, peroxide and acid values were determined by the method of Davine and Williams (14). The iodine value was determined by the method of Strong and Kock (15), the saponification number by the procedure of Williams (16) while the unsaponifiable matter was obtained by the method of FAO (17)
		The saponfication number was highest in fried (163.0 ±2.60) and lowest in raw (161.3 ± 2.92) oil extracts. These values would indicate that the samples contain a large number of fatty acids of low molecular weight and hence useful in soap industries and in the manufacture of lather shave creams (33).
	www.bioline.org.br /request?bk03018 (1470 words)

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