Food Science B

[knightmoves]

I don't think a store-bought salinometer is allowed.

Correct. Rule 2d: "Each team must bring a participant-made salinometer/hydrometer capable of measuring salt concentrations between 1-10% (mass/volume)."

[varnina07]

Do we need to know about the fungus/yeasts in food like saccharomyces?

[DragonTownEpic]

Yup.

[scienceenerd101]

Hi Guys!

Does anyone have any good sources to study?

[Amoeba55]

Does anyone know any instructional resources to construct an electrical salinometer using an Arduino? Thanks.

[Advith9]

In rule 2b, it says we must build a salinometer capable of measuring 1-10 percent salt solution. It also states that it must operate within a 500 ml beaker filled with at least 400 milliliters of water. But at the regional contest, while measuring the salt content of pickling liquids, we had to work with a 100 ml graduated cylinder. Should I expect to see that at state? Or should I just focus on 400 and 500ml when building the salinometer.

[Advith9]

Amoeba55 - For regionals I made an arduino ppm sensor. PPM (parts per million) is an accepted measure of salinity. However, I think the judges were kind of confused because they wanted salinity percent. So I just ended up using my backup manual density salinometer. There is a way of finding percent from ppm and we did that, but that meant we had to calibrate the ppm sensor everytime to get accurate results. And I wasn't very confident with that. Here is the project I used - https://hackaday.io/project/7008-fly-wa ... er-arduino
Hope this helps

[kaylhsu23@gmail.com]

Do I need to know what each and every fermented food or just a select few?

[drcubbin]

In rule 2b, it says we must build a salinometer capable of measuring 1-10 percent salt solution. It also states that it must operate within a 500 ml beaker filled with at least 400 milliliters of water. But at the regional contest, while measuring the salt content of pickling liquids, we had to work with a 100 ml graduated cylinder. Should I expect to see that at state? Or should I just focus on 400 and 500ml when building the salinometer.

I have run Food Science for several invitationals as well as having supplied the materials for the NYC Regional. The rule clearly states what you are saying. If you are provided a 100mL graduated cylinder I would definitely say something during the test. That is not appropriate.

[drcubbin]

Do we need to know about the fungus/yeasts in food like saccharomyces?

I would almost guarantee a question or two on Saccharomyces.