If you are, well, you will find that particles are contextually defined as pieces of matter in the solid or liquid phase which are suspended in the air.
I don't know if the standards body took pains to define matter in terms of atoms but if you want to run off and check? I won't stop you.
It can actually filter many types of gaseous compositions so it's really a gas filter. Have the authors even done a rudimentary PhD on filtration nomenclature? They are clearly unqualified to comment.
Seriously though I've seen enough of these sorts of Poe's that at least some of them must be serious. Must be weird living your life like that.
What is this supposed to mean? The solid or liquid phase is defined by the interaction of related molecules with each other. Suppose I have a cluster of 15 water molecules, suspended in the air, interacting with each other such that I can call them a tiny droplet of liquid water. Suppose I have one oil molecule, also suspended in the air. It is much larger than the 15 water molecules are combined. But it's not in a solid or liquid phase, because there's only one of it. The filter is required to handle the water, but there are no requirements for how it should handle the oil?
What it means is that you're trading on a half-recalled education, and trying to sound clever, but what's happening is you're being annoying in various not-even-wrong ways.