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A rapid technique to estimate the concentration of dissolved organic matter from corn straw using the UV–visible spectrophotometer was developed in this study. We tested samples and suitable relationship for the concentration of dissolved organic matter (DOM) with absorbance. The results demonstrated that the relationship between absorbance (254nm) and concentration of DOM is good surrogate to estimate the concentration of the DOM from corn straw. Absorption of DOM verified that it doesn’t depend on pH in normal working range. Relatively, this method is very less time consuming, and low cost than the Chemical oxygen demand method and TOC–analyzer method. The absorbance (254nm) with concentration of DOM has linear relationship with high correlation (R2 = 0.998). It is suggested that the absorbance (254nm) should be used as a surrogate for concentration of DOM from corn straw.

Relationship for the Concentration of Dissolved Organic Matter from Corn Straw with Absorbance by using UV�CVisible Spectrophotometer