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The use of surfactant in chemical flooding techniques to increase the oil production has been investigated for several decades. However, the injection of surfactant is potential to be lost during the process due to the adsorption of surfactant into the core. It is therefore crucial to analyzed the concentration of surfactant before and after injection to the core. Many methods are developed for determining the content of surfactant using UV-Vis Spectrophotometer by utilizing the chromophore group of the chemical. However, for the analysis of a molecule that lack of this colour function, need to be developed using other techniques, such as mobile 1H NMR measurement. In this study, quantification of nonionic surfactant that absent of chromophore group was performed using a combination of mobile 1H NMR with Solid Phase Extraction (SPE). SPE was used to extract the samples that dissolved in water, whereas 1H NMR was used to identify the levels of nonionic surfactants that dissolved in deuterized solvents. Internal standard chemical was added to the sample to verify the concentration of samples. As a stationaty phase was SPE C-18 and eluent was methanol, ethyl acetate, and n-hexane. Furthermore, the SPE results were measured using mobile 1H NMR 43 MHz with selected solvents namely deuterized chlorophome (CDCl3) and internal standard Dimethyl Formamide (DMF). Optimization results for determination of surfactant concentration up to 0.5% w/w was using the C-18 stationary phase, mobile phase methanol, ethyl acetate, and n-hexane.