Washburn Method (WM) as a typical contact angle measurement (θ) method can be used for assessment of powder wettability (especially representative particle size range for flotation separation). However, as an indirect method, WM has several limitations. This investigation is going to introduce an Enhanced Washburn Method (EWM), which fills the gap of those WM obstacles, and can be applied for the meaningful indirect θ measurement of powders. For such a purpose, the wettability of quartz powders (d₈₀: 62 μm) was measured in the absence and in the presence of the cationic surfactant Flotigam®EDA at pH 10. EWM by using pre-conditioning of hydrophobized particles via unblock capillaries measured the θ of powders in different conditions. Statistical evaluations indicated that EWM could quite accurately measure θ of the hydrophobized powders, where there is a significant coefficient of determination (R² above 0.96) between EWM outcomes and other examined direct θ measurement methods (the captive bubble and sessile drop methods).

Washburn方法（WM）作为典型的接触角测量（θ）方法可用于评估粉末的润湿性（特别是浮选分离的代表性粒度范围）。但是，作为一种间接方法，WM具有一些局限性。这项研究将引入一种增强的Washburn方法（EWM），该方法可以填补这些WM障碍的空白，并可以用于有意义的粉末间接θ测量。为此目的，石英粉的润湿性（d ₈₀：在不存在和存在阳离子表面活性剂Flotigam®EDA的条件下，在pH 10的条件下进行测量（62μm）。EWM通过使用疏水性颗粒的预调节和疏松毛细管对疏水性颗粒进行预处理，从而测量了粉末在不同条件下的θ。统计评估表明，EWM可以非常准确地测量疏水化粉末的θ，在EWM结果与其他经过检验的直接θ测量方法（俘获气泡和无液滴法）之间存在很大的确定系数（R ²高于0.96）。