Phosphate testing

[BuffaloLake]

there is no other way to be 100% than you make a reference fluid and based on that calibrate the Trident and/or check the Hanna.

The Trident comes with a calibration solution in each reagent set.

Yes, but this is the Trident NP nitrate and phosphate only. The calibration fluid that they send out only calibrates the head pressure on the sample line. It doesn’t contain either N or P to calibrate the results. To perform a calibration, you must prepare your own sample with known values. I was using my Hanna checkers to do this, but then my ICP results made me question my Hanna.

 

[areefer01]

Yes, but this is the Trident NP nitrate and phosphate only. The calibration fluid that they send out only calibrates the head pressure on the sample line. It doesn’t contain either N or P to calibrate the results. To perform a calibration, you must prepare your own sample with known values. I was using my Hanna checkers to do this, but then my ICP results made me question my Hanna.

Do you have a source for this information? The calibration solution for the NP is known and preset. You do not enter a value on the nor is there any value on the bottles. It does not do any pressure testing on the sample lines or manifold.

The manual calibration option was only added after the release as hobbyist wanted to closer align with their manual test kits. If you go with your manual test results the recommended way is to collect a pint of water, from the sample line area, run 4 to 5 tests, discard any anomalies, enter those values, then use the remaining water to calibrate.

 

[BuffaloLake]

Yes, but this is the Trident NP nitrate and phosphate only. The calibration fluid that they send out only calibrates the head pressure on the sample line. It doesn’t contain either N or P to calibrate the results. To perform a calibration, you must prepare your own sample with known values. I was using my Hanna checkers to do this, but then my ICP results made me question my Hanna.

Do you have a source for this information? The calibration solution for the NP is known and preset. You do not enter a value on the nor is there any value on the bottles. It does not do any pressure testing on the sample lines or manifold.

The manual calibration option was only added after the release as hobbyist wanted to closer align with their manual test kits. If you go with your manual test results the recommended way is to collect a pint of water, from the sample line area, run 4 to 5 tests, discard any anomalies, enter those values, then use the remaining water to calibrate.

“Additionally, the Trident is factory calibrated upon your receipt of the unit. The calibration process simply allows for the Trident to be calibrated to your specific installation- such as sample line head height. Do not expect drastic changes in your measurements compared to before and after the calibration.”


This is directly from Neptunes website on the NP. They spell out that it calibrated head height, and that you shouldn’t expect the readings to change.

 

[areefer01]

“Additionally, the Trident is factory calibrated upon your receipt of the unit. The calibration process simply allows for the Trident to be calibrated to your specific installation- such as sample line head height. Do not expect drastic changes in your measurements compared to before and after the calibration.”


This is directly from Neptunes website on the NP. They spell out that it calibrated head height, and that you shouldn’t expect the readings to change.

I am aware of that. That is for the installation which will vary among us. The calibration task provides an option for using the included solution (known values) or hobbyist manual test results. That was my point. The values are used and tests are conducted.

The sample line is important which is why it can't be modified. But the calibration task is still that, a calibration routine to a known, or entered, value.

 

[BuffaloLake]

“Additionally, the Trident is factory calibrated upon your receipt of the unit. The calibration process simply allows for the Trident to be calibrated to your specific installation- such as sample line head height. Do not expect drastic changes in your measurements compared to before and after the calibration.”


This is directly from Neptunes website on the NP. They spell out that it calibrated head height, and that you shouldn’t expect the readings to change.

I am aware of that. That is for the installation which will vary among us. The calibration task provides an option for using the included solution (known values) or hobbyist manual test results. That was my point. The values are used and tests are conducted.

The sample line is important which is why it can't be modified. But the calibration task is still that, a calibration routine to a known, or entered, value.

I don’t have that option, and I have never found anything on the Neptune website about this. If I go to the task menu, the initial calibration for head pressure is the only option. If you go directly to the Trident NP tab, you can perform a manual calibration with values that you enter in, But there is no option for calibration with the Trident solution.