电镀溶液表面张力过大，湿润剂不足。
Plating solution surface tension is too large, wetting agents insufficient.
溶液表面张力的测定需要一个复杂的实验测量计算过程。
A complex lab calculation process is needed to test the surface tension of the liquid.
如果溶液远离这个等电位点，那么蛋白质会是高度可溶的因此表面张力梯度就无法形成；如果太接近这个等电位点，蛋白质会析出沉淀。
If the solution is too far from the IEP, the proteins are highly soluble and surface tension gradients never develop; too close, and the proteins precipitate out.
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