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In this article we look at the benefits of ASTM D8148 using an instrument which utilizes a proprietary spectrophotometric/nephelometer optical technology consisting of a combination of a near-infrared light-emitting diode light source and photodiode detectors positioned to measure transmission and scatter across the test specimen. This approach is critical to achieve limits of detection and sensitivity across the entire 1 to 6 haze rating range without regard to the color of the fuel. This in turn enables the ability to simultaneously determine a qualitative Instrument Haze Rating (IHR) and quantitative Haze Clarity Index (HCI). This method offers significant improvements in terms of accuracy, precision and safety over existing methods and is being proposed as an alternative to the current ASTM D4176 procedure.

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