methene การใช้

• This thesis consists of four chapters : ( 1 ) a review ; ( 2 ) study on the optical chemical membrane for detection of lead ion by using 2 - hydroxy - 1 - naphthaldehydene - 8 - aminoquinoline as fluorescence indicator ; ( 3 ) study on the optical chemical membrane for detection of lead ion by using meso - ( 4 - methyloxyphenyl ) porphyrin as fluorescence indicator ; ( 4 ) study on the optical chemical membrane for detection of lead ion by using 2 - methene - benzimidazole monoaza - 18 - crown - 6 as fluorescence indicator . in chapter one , the laboratory method for determination of lead ion , the progresses of chemical sensor for detection of lead ion recently and the introduction of the basic theory , relative merits of sol - gel and its application in optical chemical sensor were involved