Abstract
In this study, a rapid, sensitive and novel nanodrop spectrometric approach is used for the trace level determination of cationic surfactant methyltrioctylammonium chloride (MTOAC) based on the reaction of Mo(III)-SCN− complex with MTOAC in acidic condition. The molar absorptivity of red-colored Mo(III)-SCN− complex was enhanced in the presence of MTOAC that is attributed to a hyperchromic shift. The absorptivity value of the complex with respect to MTOAC is 9.8 × 104 L mol−1 cm−1 at λmax 415 nm. The quality parameters show the good analytical performance of the proposed method with detection limit (LOD) of 8.3 × 10−3 mg L−1 and limit of quantitation of 2.7 × 10−2 mg L−1. The calibration curve for MTOAC determination obeys Beer’s law with the concentration limit of 0.05–0.40 mg L−1 and determination coefficient (R2) 0.9992 along with slope and intercept 9.5 and 0.002, respectively. The proposed NDS method has been applied successfully in different environmental and biological samples for the determination of MTOAC.
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