CAJ | 학술논문

基于国内外最新研究工作,系统总结了离子选择电极膜中革除或减少外增塑剂的新膜基体,包括丙烯酸酯类聚合物、羟基功能化的乙烯基树脂、聚氨酯、硅橡胶以及导电聚合物,对其物理化学性能以及传感器检测等进行了全面归纳与讨论.指出该类革除外增塑剂的传感膜不仅避免了增塑剂的泄漏及其对生物样品的污染,而且较传统增塑聚氯乙烯(PVC)膜扩散系数降低了约3个数量级,有利于抑制过膜离子流,使其检测下限较传统增塑PVC下降了5个数量级,且选择系数也有不同程度的改善.另外,该类传感膜材料由于与固体支撑材料间优良的粘附性保证了电极的使用寿命,特别是在微型化固态电极中.以这类传感膜构建的电位型离子传感器将以其独特的优势在环境监测、食品卫生,尤其是在医疗诊断、生物物质检测中展示出不可替代的作用.
기우국내외최신연구공작,계통총결료리자선택전겁막중혁제혹감소외증소제적신막기체,포괄병희산지류취합물、간기공능화적을희기수지、취안지、규상효이급도전취합물,대기물이화학성능이급전감기검측등진행료전면귀납여토론.지출해류혁제외증소제적전감막불부피면료증소제적설루급기대생물양품적오염,이차교전통증소취록을희(PVC)막확산계수강저료약3개수량급,유리우억제과막리자류,사기검측하한교전통증소PVC하강료5개수량급,차선택계수야유불동정도적개선.령외,해류전감막재료유우여고체지탱재료간우량적점부성보증료전겁적사용수명,특별시재미형화고태전겁중.이저류전감막구건적전위형리자전감기장이기독특적우세재배경감측、식품위생,우기시재의료진단、생물물질검측중전시출불가체대적작용.
New membrane matrices used in ion selective electrodes, such as polyacrylate, vinyl resin, silicone rubber, polyurethane, and conducting polymer without or with a reduced amount of plasticizer, are systematical y summarized based on the latest literature. Physical and chemical properties of these membrane martrices, as wel as their resultant potentiometric sensor performance, are reviewed thoroughly. It is pointed out that these new sensing membrane matrices not only avoid plasticizer leakage that would contaminate biological samples, but also reduce the diffusion coefficients of these sensing membranes by about 3 orders of magnitude, which is very helpful to suppress the ion flux. The lower diffusion coefficient results in fal ing of a lower detection limit by 5 orders of magnitude compared to the traditional plasticized PVC sensing membrane. At the same time, the selectivity coefficients have also been improved. In addition, these new materials have excel ent adhesion properties with solid support materials, which ensure long lifetimes of the ion selective electrodes, especial y in solid state electrodes. Unique new potentiometric sensors based on these new sensing membrane materials without or with reduced amounts of plasticizer could play an important role in many areas such as environmental monitoring and food safety, and would be especial y useful in medical diagnosis and detection of biomaterials.