DIY calibration fluid?

[moretor1]

Hi all, I recently made the mistake of purchasing a refractometer and no solution.
I understand that you're supposed to calibrate them As close to the goal level as possible

My question is can I just measure out 3.5g of salt on a jewelry scale and add it to 100ml of water? I have calibration weights for my scale so I can be 100% sure about the weight and volume of the water

Is there any reason this wouldn't work? Does it need go be a more exact concentration than 35g/L?
My scale goes to the .0001g so I can be about as exact as needed

 

[ReeferFive-0]

Check out the Articles section, there is an article for DIY calibration solution.

To sum it up for refractometers, it's 3.65g of Morton's iodized salt to 96.35g (mL) of RODI/distilled water. I did this the other day and it worked well.