【How-to】How do you make 1 m phosphoric acid

If you have access to such a 85 % solution and need a 0.1 % (v/v) solution, transfer 1 ml of the concentrated acid into a 1 L volumetric flask containing some volume of HPLC-grade water while stirring the flask, wait for the temperature to return to room temperature, finally fill to a total volume of 1 L.