Abstract: A method and kit for detecting the presence of diesel exhaust fluid in fuel is disclosed. The method includes obtaining a fuel sample, combining the fuel sample with a buffered urease solution to make a test solution, agitating the test solution, allowing the test solution to separate into layers and convert urea to ammonia. The method also includes adjusting a pH of the aqueous layer of the test solution, isolating the aqueous layer, immersing, agitating and then removing a reagent strip, and allowing the aqueous layer to develop a color change for an indication of presence of ammonia from any DEF contamination.

Abstract: A method and kit for detecting the presence of diesel exhaust fluid in fuel is disclosed. The method includes obtaining a fuel sample, combining the fuel sample with a buffered urease solution to make a test solution, agitating the test solution, allowing the test solution to separate into layers and convert urea to ammonia. The method also includes adjusting a pH of the aqueous layer of the test solution, isolating the aqueous layer, immersing, agitating and then removing a reagent strip, and allowing the aqueous layer to develop a color change for an indication of presence of ammonia from any DEF contamination.

Abstract: A method and kit for detecting the presence of diesel exhaust fluid in fuel is disclosed. The method includes obtaining a fuel sample, combining the fuel sample with a buffered urease solution to make a test solution, agitating the test solution, allowing the test solution to separate into layers and convert urea to ammonia. The method also includes adjusting a pH of the aqueous layer of the test solution, isolating the aqueous layer, immersing, agitating and then removing a reagent strip, and allowing the aqueous layer to develop a color change for an indication of presence of ammonia from any DEF contamination.

Abstract: An active or functional organic compound is solubilized in a phenylethyl ester, e.g. an aryl carboxylic ester of 2-phenylethyl alcohol, as a solvent, cosolvent or additive, to form a composition thereof. Representative active or functional organic compounds include personal care products, e.g. sunscreens containing UVA/UVB absorbing compounds, such as avobenzone and benzophenone-3. Such compositions also show increased critical wavelength and UVA/UVB absorbance ratio performance properties.

Abstract: An active or functional organic compound is solubilized in a phenylethyl ester, e.g. an aryl carboxylic ester of 2-phenylethyl alcohol, as a solvent, cosolvent or additive, to form a composition thereof. Representative active or functional organic compounds include personal care products, e.g. sunscreens containing UVA/UVB absorbing compounds, such as avobenzone and benzophenone-3. Such compositions also show increased critical wavelength and UVA/UVB absorbance ratio performance properties.