Greek Aquarist's Boards - Φόρουμ συζητήσεων γιά το χόμπυ του Ενυδρείου - Συζητηση για τα ειδη τεστ αμμωνιας "salicylate-based" και Nessler.

Δεν θελω να σας ανησυχησω αλλα τo θεμα εχει ως εξης.

Διαβαζω σε πολλα αρθρα σε ξενα σαιτ (εχω παρακατω παραπομπες), οτι τα "salicylate-based" test (αυτα που εχουν συνηθως δυο μπουκαλακια με υγρο και τα αποτελεσματα δειχνουν σε χρωματα απο κιτρινο, σε πρασινο, σε μπλε) μετρανε ελευθερη τοξικη Αμμωνια (ΝΗ3) και οχι ολικη αμμωνια (ΝΗ3/4) (που η τοξικοτητα εξαρταται απο pH και θερμοκρασια κλπ).
Την οποια ολικη αμμωνια, μετρανε τα τεστ "Nessler" (τεστ με ενα μπουκαλακι και τα αποτελεσματα δειχνουν σε αποχρωσεις του κιτρινου του κεχριμπαριου ή καφε).

Και η ερωτηση/θεμα ειναι:
Ειναι προφανες οτι τα τεστ που χρησιμοποιουμε συνηθως, ειναι τα salicylate-based.
Πως γινεται ομως και μετρανε ολικη αμμωνια (ΝΗ3/4) ????? :confused:
Εχω καταλαβει κατι λαθος?

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Πχ η APi λεει οτι μετραει NH3/NH4 (ολικη αμμωνια)
http://angelfins.ca/images/api_ammonia_test_kit.jpg
και στο φυλλάδιο μεσα γραφει οτι το τεστ ειναι "salicylate-based" test.
"This salicylate-based ammonia test kit reads the total ammonia level ..."
http://www.apifishcare.com/pdf/Ammon...600_Insert.pdf
Και οντως επικοινωνησα και μου το επιβεβαιωσαν οτι μετραει Ολικη Αμμωνια.
Περαιτερω εξηγηση ομως περι "nessler" και "salicylate-based", δεν μου εδωσαν.

Παράθεση:

I would like a clarification about the APi AMMONIA (NH3/NH4+) TEST KIT.
I read that Salicylate versions are testing for unionized NH3 only, and Nessler versions test TAN (Total Ammonia Nitrogen) NH3/NH4.
In your AMMONIA (NH3/NH4+) TEST KIT INSTRUCTIONS i read "This salicylate-based ammonia test kit reads the total ammonia level"
What i'm testing finally?
Unionized NH3? or total NH3/NH? so i can calculate the real unionized NH3 with ammonia calculators considering pH and temperature

Thank you in advance
Spyros Delta

Παράθεση:

Thank you very much for contacting us regarding our products. All of your comments and questions are valuable. We use your feedback to create the most effective line of aquarium and pond products available.
Spyros I am going to have to check with the lab to determine the answer to your question.
If you have any other questions or wish to discuss this further, please email back or give us a call at 1-800-847-0659.

Best Regards,
Nathan Fekula
Technical Service and Research
Mars Fishcare

Παράθεση:

Spyros you’re reading total ammonia, so you can calculate nh4+ with the usual charts

Best Regards,
Nathan Fekula
Technical Service and Research
Mars Fishcare

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Και ο αντιλογος:

Παράθεση:

Nessler kits have one reagent, that is, a single bottle of liquid or one tablet to dissolve in your water sample. If your ammonia test kit registers in shades of amber, it's Nessler. They generally are quicker to use, but ammonia-locking products (e.g., AmQuel) will cause Nessler kits to give false positive readings. Nessler test kits measure ammonia NH3 and ammonium NH4. This is important to note and often missed as you will need to use a look up chart so see NH3 levels.

New Salicylate based tests, with two sets of reagents measure NH3. If your ammonia test kit registers in shades of yellow to green to blue, its salicylate. Salicylate test kits are unaffected by AmQuel and similar products, but they do take longer to develop a reading and are more complicated to use correctly which can affect accuracy.

http://answers.seneye.com/index.php?...monia_Test_Kit

Παράθεση:

The Nessler method test kit is designed to test the total combined ammonia (NH3) and ammonium (NH4+) levels. The color chart measures in shades of amber or brown. If you are treating your tank with AmQuel+ or a similar ammonia fighting water conditioner then you aren’t interested in the total ammonia level, you are only interested in any toxic ammonia that may be present. If you test with a Nessler test kit you may get a false positive. Technically it isn’t “false” but it is telling you more then you need to know. More recently, Salicylate based test kits have been the norm on store shelves. They measure ammonia in shades of green and only warn you of dangerous (NH3) ammonia levels. These are safe to use with water conditioners like AmQuel+ or Ammo Lock.

http://nippyfish.net/2006/08/08/ammo...vs-salicylate/

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Εχω και μια τριτη αποψη, οτι και τα δυο ειδη μετρανε ολικη

Παράθεση:

1. Nessler reagent type test kits, which are fine for fresh water, but give false readings in salted or salt water. It reads total ammonia and does not read thru bound ammonia to get an accurate free ammonia (the harmful ammonia as opposed to bound ammonia) reading,
2. Salicylate reagent type test kits, which are good for freshwater or saltwater. Again, these kits read total ammonia and do not read thru bound ammonia to give accurate, free ammonia only readings.

http://www.nfkc.info/Discussions%20on%20ammonia.htm

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Μηπως η διαφορα των αποψεων, βρισκεται στη λεξη "new"?

Παράθεση:

"New Salicylate based tests with two sets of reagents measure NH3 ..... "

Τα νεα Salicylate τεστ δλδ μετρανε ΝΗ3 και τα παλια (πχ api κλπ), μετραγαν ολικη (ΝΗ3/4)?

.