Trying to figure out who's right Hanna vs Apex trident.
1st problem is Hanna's 10 ml marking on vials are not accurate. Let me say that I have some old vials that are exactly on but my newer ones that say Hanna are all off. I have a lab grade scale ($1k) and that measures grams out to 4 places. From what I can gather 10ml of seawater ways 10.24 grams around 79 degrees. My cheap 10ml syringe is almost exactly on.
Used scale to measure water out.
Had recently calibrated apex with their solution.
Brand New reagent for Hanna. A matter of fact used 2 brand new ones to make sure.
2 separate Hanna checkers and both were checked against Hanna calibration vials and were exactly on.
Hanna measured about .8 Dkh higher then the trident. Then I measured 2 brand new Apex trident calibration fluids . Same results. Was able to duplicate at least 4 times on each test.
Conclusion . Hanna vials are way off. The 10ml lines were actually around 9.4ml.
Apex solution appears to be low.
I checked the MG and CAL against red sea and the trident and RS were exactly the same. Used magnetic stirrer for results.
Hanna, you listening, what's up with your vials??
Anyone see any flaws in my trials??
1st problem is Hanna's 10 ml marking on vials are not accurate. Let me say that I have some old vials that are exactly on but my newer ones that say Hanna are all off. I have a lab grade scale ($1k) and that measures grams out to 4 places. From what I can gather 10ml of seawater ways 10.24 grams around 79 degrees. My cheap 10ml syringe is almost exactly on.
Used scale to measure water out.
Had recently calibrated apex with their solution.
Brand New reagent for Hanna. A matter of fact used 2 brand new ones to make sure.
2 separate Hanna checkers and both were checked against Hanna calibration vials and were exactly on.
Hanna measured about .8 Dkh higher then the trident. Then I measured 2 brand new Apex trident calibration fluids . Same results. Was able to duplicate at least 4 times on each test.
Conclusion . Hanna vials are way off. The 10ml lines were actually around 9.4ml.
Apex solution appears to be low.
I checked the MG and CAL against red sea and the trident and RS were exactly the same. Used magnetic stirrer for results.
Hanna, you listening, what's up with your vials??
Anyone see any flaws in my trials??