Impact of organic-inorganic color additive on the properties of ethylene-norbornene copolymer

2020 ◽  
Vol 82 ◽  
pp. 106290 ◽  
Author(s):  
Anna Marzec ◽  
Bolesław Szadkowski ◽  
Małgorzata Kuśmierek ◽  
Jacek Rogowski ◽  
Waldemar Maniukiewicz ◽  
...  
Keyword(s):  
Color Additive

Decomposition of 4,4'-(Diazoamino)-bis(5-methoxy-2-methylbenezenesulfonic Acid) in Solutions ofFD&C Red No. 40

1984 ◽  
Vol 67 (4) ◽  
pp. 844-845
Author(s):  
Naomi Richfield-Fratz
Keyword(s):  
Liquid Chromatography ◽  
Aqueous Solutions ◽  
Borate Buffer ◽  
Sodium Borate ◽  
First Order ◽  
First Order Kinetics ◽  
Color Additive ◽  
Sodium Borate Buffer

Abstract 4,4'-(Diazoamino)-bis(5-methoxy-2-methylbenzenesuIfonic acid), when present as a reaction by-product in FD&C Red No. 40, is shown to decompose rapidly in aqueous solutions of the color additive. The decomposition is halted by the addition of sodium borate buffer. Quantitationly liquid chromatography shows that decomposition is nonlinear with time and follows approximate first order kinetics.

TLC Separation and Spectrophotometric Determination of 2-Aminoanthraquinone in D&C Blue No. 9

1969 ◽  
Vol 52 (4) ◽  
pp. 831-832
Author(s):  
Sandra J Bell
Keyword(s):  
Acetic Acid ◽  
Thin Layer ◽  
Spectrophotometric Determination ◽  
Diethyl Ether ◽  
Thin Layer Plate ◽  
Color Additive ◽  
Tlc Separation

Abstract Batches of 3,3’-dichloroindanthrene meeting the specifications set forth in the Color Additive Regulations are certifiable as D&C Blue No. 9. One of the specifications requires that D&C Blue No. 9 contain no more than 0.2% 2-aminoanthraquinone. In the method described, 2-aminoanthraquinone is extracted from D&C Blue No. 9 with dimethylsulfoxide, together with several other impurities. This solution is spotted onto a thin layer plate and developed with diethyl ether. After removal from t he plate, the 2-aminoanthraquinone is extracted into acetic acid and the amount is determined spectrophotometrically. Recoveries of 0.1, 0.2, and 0.5% of added intermediate ranged from 86 to 96%.

Determination of Aniline, 4-Aminoazobenzene, and 2-Naphthol in the Color Additive D&C Red No. 17 Using Ultra-High-Performance Liquid Chromatography

2018 ◽  
Vol 101 (6) ◽  
pp. 1961-1966 ◽  
Author(s):  
H H Wendy Yang ◽  
Adrian Weisz
Keyword(s):  
High Performance ◽  
Ammonium Acetate ◽  
Correlation Coefficients ◽  
Hplc Method ◽  
Chromatography Method ◽  
Relative Standard ◽  
Data Points ◽  
Color Additive ◽  
The U.S

Abstract Specifications in the U.S. Code of Federal Regulations for the color additive D&C Red No. 17 (R17, Colour Index No. 26100) limit the levels of the dye’s intermediates, aniline (AN), 2-naphthol (β-naphthol, BN), and 4-aminoazobenzene (4AAB), to 0.2, 0.2, and 0.1%, respectively. The present work reports the development and application of an ultra-HPLC method for the quantitative determination of these impurities in R17. A 1.7 μm particle size C-18 column was used with 0.2 M ammonium acetate and acetonitrile as the eluents. AN, BN, and 4AAB were quantified by using six-point calibration curves with data points (w/w) ranging from 0.01 to 0.25% for AN, 0.01 to 0.24% for BN, and 0.01 to 0.19% for 4AAB. The correlation coefficients ranged from 0.9992 to 0.9999. Limits of detection for the analytes ranged from 0.002 to 0.01%. Recoveries of the analytes ranged from 99.5 to 102%. Relative standard deviations ranged from 0.482 to 1.262%. The new method was applied to analyze portions from 22 batches of R17 submitted to the U.S. Food and Drug Administration for certification. It was found to be simpler to implement, faster, and more sensitive than the older gravity-elution column chromatography method, which it has replaced.

Lack of genotoxicity in vivo for food color additive Allura Red AC

2017 ◽  
Vol 105 ◽  
pp. 308-314 ◽  
Author(s):  
Maria Bastaki ◽  
Thomas Farrell ◽  
Sachin Bhusari ◽  
Kamala Pant ◽  
Rohan Kulkarni
Keyword(s):  
Allura Red ◽  
Color Additive

scholarly journals Presence of Yellow 6, an Artificial Colour Additive in Orange Juice

2012 ◽  
Vol 25 (1) ◽  
pp. 80-86 ◽  
Author(s):  
Abida Sultana ◽  
Mohammad S Haque ◽  
Mohammad Shoeb ◽  
M Saiful Islam ◽  
M Iqbal R Mamun ◽  
...  
Keyword(s):  
Adverse Effects ◽  
Orange Juice ◽  
Cost Effective ◽  
Chemical Society ◽  
Soft Drinks ◽  
Visible Absorption ◽  
Cost Effective Method ◽  
The World ◽  
Uv Visible ◽  
Color Additive

Soft drinks and orange juices are very popular all over the world including Bangladesh. Yellow 6 (Disodium 6-hydroxy-5-(4-sulfophenyl) azo-2-naphthalenesulfonate) was used in food and drinks as color additives earlier but due to its adverse effects on human health, yellow 6 has been banned in many countries. However, this harmful color additive yellow 6 is being used in commercial orange drinks in Bangladesh. Ten commercial brand yellow colored soft drinks and juices were analyzed to find out the presence of yellow 6. Juice prepared from fresh fruits was used as control. The UV-visible absorption maxima of yellow 6 is 429 nm. The amount of yellow 6 in commercial brands and fresh orange juices was determined by UV-visible spectrophotometer. Out of ten samples, seven juice samples were found to contain yellow 6 in the range of 0.83-1.66 mg/mL.   Fresh juice did not show any absorption at 429 nm. This is an easy and cost effective   method to assess the presence of yellow 6 in orange juice and the method can be used for other food stuffs. DOI: http://dx.doi.org/10.3329/jbcs.v25i1.11778 Journal of Bangladesh Chemical Society, Vol. 25(1), 80-86, 2012

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