scholarly journals A Slight Polymerization of Ethylene Chlorohydrin with Ethylene Oxide in the Presence of Phosphoric Acid

1963 ◽  
Vol 66 (4) ◽  
pp. 471-473 ◽  
Author(s):  
Yoshiro Abe ◽  
Shoichiro Watanabe
Keyword(s):  
Ethylene Oxide ◽  
Phosphoric Acid ◽  
Ethylene Chlorohydrin

Determination of 2-Chloroethanol in Honey, Beeswax, and Pollen

1983 ◽  
Vol 66 (3) ◽  
pp. 659-662
Author(s):  
Gary W Bruns ◽  
Robert A Currie
Keyword(s):  
Ethylene Oxide ◽  
Maximum Amount ◽  
Ethylene Chlorohydrin ◽  
Liquid Chromatograph ◽  
Naturally Occurring ◽  
Specific Detector

Abstract Procedures were developed and tested for the determination of residues of 2-chloroethanol (ethylene chlorohydrin, ECH) in honey, beeswax, and pollen. Recoveries of ECH from fortified samples averaged 91,87, and 89%, respectively, for each substrate. The maximum amount of ECH found in substrate fumigated with ethylene oxide was 36 μg/g in honey, 124 μg/g in beeswax, and 132 μg/g in pollen. A tendency was noted for darker waxes, which contain larger amounts of naturally occurring chlorides than light-colored waxes, to contain the greater amounts of ECH. A gas-liquid chromatograph equipped with a Dohrmann halogen-specific detector was used for identification and quantitation.

Specific Determination of Ethylene Oxide and Ethylene Chlorohydrin in Cosmetics and Polyoxyethylated Surfactants by Gas Chromatography with Electron Capture Detection

1993 ◽  
Vol 76 (2) ◽  
pp. 292-296 ◽  
Author(s):  
Kumiko Sasaki ◽  
Keiji Kijima ◽  
Mitsuharu Takeda ◽  
Shigeo Kojima
Keyword(s):  
Gas Chromatography ◽  
Ethylene Oxide ◽  
Electron Capture ◽  
Potassium Iodide ◽  
Electron Capture Detection ◽  
Potassium Iodide Solution ◽  
Ethylene Chlorohydrin ◽  
Specific Determination ◽  
Iodide Solution ◽  
Nitrogen Stream

Abstract A simple specific determination method was developed for ethylene oxide (EO) and ethylene chlorohydrin (ECH) in cosmetics and surfactants. EO is desorbed from samples by using a nitrogen stream and absorbed into acidic potassium iodide solution, where it is converted to ethylene iodohydrin (EIH). Any remaining ECH in the samples is converted to EO by the addition of sodium hydroxide, and the desorption procedure is repeated with a fresh acidic potassium iodide absorbing solution. EIH is extracted with benzene and determined by gas chromatography with electron capture detection. EO and ECH contents in the samples are calculated from EIH results. Recoveries from water and shampoo samples were 70.3 ± 5.4 and 58.9 ± 1.2%, respectively, for EO and 66.3 ± 4.0 and 64.5 ± 4.6%, respectively, for ECH. Detection limits in 0.2-2.0 g samples were in the 0.005-0.03 μg/g range for EO and 0.01-0.07 μg/g for ECH. High levels of EO (30-394 μg/g as ECH) were found in 5 of 18 polyoxyethylated surfactant samples, but only small amounts (0.07-4.0 μg/g) of ECH were detected in the samples. EO was not detected in cosmetic samples tested, but ECH was present in small quantities (≤1.11 μg/g).

Telechelic oligomers made from ethylene oxide and phosphoric acid. Structure and transformation into organoaluminum polymers

Polimery ◽  
2004 ◽  
Vol 49 (06) ◽  
pp. 389-397 ◽  
Author(s):  
ZBIGNIEW FLORJANCZYK ◽  
ANNA LASOTA ◽  
MARTA LESNIEWSKA-MIZAK
Keyword(s):  
Ethylene Oxide ◽  
Phosphoric Acid ◽  
Acid Structure

Towards polymer-inorganic hybrid molecular composites: calorimetric studies of the polymer-inorganic particles interaction

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Stanislaw Penczek ◽  
Krzysztof Kaluzynski ◽  
Julia Pretula ◽  
Zbigniew Bartczak ◽  
Wojciech Zielenkiewicz ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Phosphoric Acid ◽  
Phosphonic Acid ◽  
Inorganic Hybrid ◽  
Inorganic Particles ◽  
Molecular Composites ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Calorimetric Studies

AbstractInorganic particles of 3 CaO ⋅ SiO2 were reacted in water dispersion with dihydrophilic ionic-nonionic block copolymers, and the heat effect of interaction was measured by calorimetry. The ionic block was constituted of monoesters of phosphoric acid or alkyl phosphonic acid, both built on the polyglycidol block, attached to the poly(ethylene oxide) block. The heat evolved during the interaction is a function of the degree of phosphorylation (phosphonylation). The higher the degree of -OH substitution the stronger the interaction, the latter being stronger for phosphates than for phosphonates.

Rapid Gas Chromatographic Determination of Ethylene Oxide, Ethylene Chlorohydrin, and Ethylene Glycol Residues in Rubber Catheters

1985 ◽  
Vol 68 (3) ◽  
pp. 506-508 ◽  
Author(s):  
Richard J Muzeni
Keyword(s):  
Ethylene Oxide ◽  
Ethylene Glycol ◽  
Linear Response ◽  
Chromatographic Determination ◽  
Flame Ionization Detection ◽  
Ethylene Chlorohydrin ◽  
Flame Ionization ◽  
Coefficients Of Variation ◽  
Isothermal Gas

Abstract Isothermal gas chromatography with flame ionization detection was used to determine residual ethylene oxide (EtO), ethylene chlorohydrin, and ethylene glycol in soft rubber catheters that had been sterilized with EtO. Catheter samples were extracted by shaking with carbon disulflde, and the extract was analyzed on a 3% Carbowax 20M on 80- 100 mesh Chromosorb 101 column, using nitrogen as the carrier gas. Ten replicate injections of a mixed standards solution gave coefficients of variation of 1.91, 1.23, and 4.74% for EtO, ethylene chlorohydrin, and ethylene glycol, respectively. A linear response was obtained with concentrations ranging from 1.0 to 7.9 μg EtO, 14.0 to 88.0 μg ethylene chlorohydrin, and 31.0 to 98.5 μg ethylene glycol. The proposed method detected as little as 0.5, 5.0, and 16.5 ng EtO, ethylene chlorohydrin, and ethylene glycol, respectively.

Determination of Ethylene Oxide and Ethylene Chlorohydrin in Plastic and Rubber Surgical Equipment Sterilized with Ethylene Oxide

1970 ◽  
Vol 53 (2) ◽  
pp. 263-267
Author(s):  
Daniel J Brown
Keyword(s):  
Detection Limit ◽  
Ethylene Oxide ◽  
Chromatographic Analysis ◽  
Ethylene Chlorohydrin ◽  
Surgical Equipment ◽  
Lower Detection Limit ◽  
Lower Detection ◽  
Liquid Chromatographic Analysis ◽  
Liquid Chromatographic

Abstract A method is presented for the determination of ethylene chlorohydrin and ethylene oxide residues in plastic and rubber surgical equipment. Samples are extracted with p-xylene and the desired constituents are isolated by column chromatography. Ethylene oxide is converted to ethylene chlorohydrin on a Celite column. Sweep co-distillation is then employed for further purification, if necessary, before gas-liquid chromatographic analysis. The lower detection limit is approximately 25 ng. Recoveries of 3.5’50 ppm chlorohydrin from 20’35 g samples range from 64 to 100%, depending on the absorbing capacity of the material being analyzed and the condition of the adsorbent.

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