Hi Randy,
I saw somewhere you recommended using the PSU scale on a Milwaukee 887; I'd like to begin doing that. However, I noticed that at 21.7 C, I read 33 or 34 ppt (suggesting perhaps a real value of 33.5 to 34.4, for instance), whereas for PSU, I read 31 to 32 PSU.
Procedure for measuring water:
¯\_(ツ)_/¯
Thanks, Randy .. you've always been exceptionally helpful, and inspired an interest in chem in a way that my professor couldn't.
I saw somewhere you recommended using the PSU scale on a Milwaukee 887; I'd like to begin doing that. However, I noticed that at 21.7 C, I read 33 or 34 ppt (suggesting perhaps a real value of 33.5 to 34.4, for instance), whereas for PSU, I read 31 to 32 PSU.
Procedure for measuring water:
- Cleaned sample area with soap and rinsed thoroughly
- For each calibration or measurement, I used a light-proof cap to entirely cover the sample area
- Calibrated using 0 TDS water: 0 ppt, 0 PSU @ 21.9 C
- Verified using 0 TDS water: 0 ppt, 0 PSU @ 21.9 C
- Placed DIY 34ppt standard* in sample area and measured the following (*Standard created using Himalayan salt).
PPT measurements: 34,34,33,33,34 ppt @ 21.9 C (suggesting true value just between 33 and 34?)
PSU measurements: 32,33,33,33,32 @ 21.9 C - Placed reef aquarium water in sample area and measured the following:
PPT measurements: 34,34,34,34,34 ppt @ 21.7 C
PSU measurements: 33,33,33,33,33 @ 21.7 C
¯\_(ツ)_/¯
Thanks, Randy .. you've always been exceptionally helpful, and inspired an interest in chem in a way that my professor couldn't.