Fiber-Optic Sensor with a Chitosan/Poly(vinyl alcohol) Cladding for the Determination of Ethanol in Alcoholic Beveragest
Fiber-Optic Sensor with a Chitosan/Poly(vinyl alcohol) Cladding for the Determination of Ethanol in Alcoholic Beveragest
复制标题
具有壳聚糖/聚（乙烯醇）包层的光纤传感器用于测定酒精饮料中的乙醇
DOI：
10.2116/analsci.10.213
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
K. Ohga
中科院分区：
文献类型：
--
作者：
Y. Kurauchi;Takayuki Yanai;N. Egashira;K. Ohga
以壳聚糖/聚乙烯醇共混膜为包层，聚四氟乙烯为保护层，制备了一种用于酒精饮料中乙醇含量测定的光纤传感器。的响应被解释的基础上的临界角的光纤乙醇，这是由包层膜的收缩引起的，导致折射率的增加的增加。用戊二醛交联的包层膜提高了传感器在0 - 70 v/v%乙醇含量范围内的灵敏度。特氟隆涂层去除了酒精饮料中常见的糖和有机酸的干扰。对50 v/v%乙醇的响应时间在2 min以内，在2周内重复测定20次，相对标准偏差在1.7%以内。乙醇含量在0 - 70 v/v%范围内与响应值呈线性关系。将该传感器应用于烧酒、清酒、葡萄酒、威士忌和啤酒中乙醇的测定，结果与标准值和常规比重法测定值一致。
A fiber-optic sensor having a chitosan/poly(vinyl alcohol) blended membrane as the cladding and a Teflon protective coating was fabricated to determine ethanol in alcoholic beverages. The response was explained on the basis of an increase in the critical angle of the optical fiber by ethanol, which was induced by a shrinkage of the cladding membrane, leading to an increase in the refractive index. Crosslinking of the cladding membrane with glutaraldehyde enhanced the sensor sensitivity in the 0 - 70v/v% ethanol-content range. The Teflon coating removed interferences from sugars and organic acids commonly present in alcoholic beverages. The response time was within 2 min for 50v/v% ethanol and the relative standard deviation was within 1.7% in 20 repeated determinations during a 2-week period. A linear relationship was obtained between the response and the ethanol content in the 0 - 70v/v% range. The sensor was applied to the determination of ethanol in shochu, sake, wine, whiskey and beer and the results were consistent with the certified values and values obtained by the conventional specific-gravity method.