Sodium Hydroxide → HCID 178418600, compound

Participants

Reaction Conditions

Reaction Steps

1.31 Gram (5 mmol) of L-arginine methyl ester dihydrochloride was dissolved in 4 ml of methanol, and 2.5 ml of 2 N aqueous sodium hydroxide solution was added thereto to prepare a treating agent solution. An untreated cotton cloth (160 mm×170 mm, 5.0 g) was allowed to uniformly absorb the total amount of the above treating agent solution and then air-dried for an hour at room temperature. The dried cloth was heat-treated for 20 minutes at 140° C. in a batch type hot air oven (“IPHH-2000”, an inert oven manufactured by Tabaiesbeck Co., Ltd.) and then washed with water. It was further washed with 5% aqueous sodium bicarbonate solution and rinsed three times with water and subsequently washed with 10% aqueous citric acid solution and rinsed three times with water, and finally washed with a JAFET standard detergent solution for household washing machine, rinsed with water and air-dried. A part of this cloth was cut and a solution of ninhydrin in butanol was sprayed on it. Thereafter, it was heated for 10 minutes in an oven of 110° C. to cause coloring thereby the presence of the amino acid was confirmed. As a result of determination for the amount of the bonded L-arginine, it was 0.08 mmol based on 1 g of the cloth. The degree of esterfication was 0.013.

Provenance & Evidence