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Test Kit Safety

Discussion in 'Equipment and DIY' started by Kasakato, Mar 5, 2005.

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  1. Kasakato

    Kasakato
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    SatCan

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    I just thought it would be a good idea to remind/tell people about the dangerous of a test kit. I myself have not been hurt by anything from my test kit, but it may be possible. I was reading my test kit booklet and noticed a lot of warning labels/boxes. I just did an experiment in school and noticed how important these warnings are, (you could mess up the room's power if you don’t read them, the teachers wont be too happy about this) so why should test kits be so different?

    I have the well reviewed "Aquarium Pharmaceuticals Freshwater Master Test Kit". It has the most important tests and I find it easier to use than any other test kit out there.

    Here is a list of the dangerous chemicals in each separate test:


    pH Test
    -None noted

    High Range pH Test
    -None noted

    Ammonia Test
    [​IMG] [​IMG]
    -Sodium hydroxide (Saftey Sheet)
    -Sodium hypochlorite (Saftey Sheet)

    Nitrite Test
    [​IMG] [​IMG]
    -Sodium Hydrochloric Acid (Safety Sheet)

    Nitrate Test
    [​IMG] [​IMG] [​IMG]
    -Hydrochloric Acid (Saftey Sheet)

    And there you have it! Just a quick page about watching what you do. I use gloves and eye protection for saftey, just in cast. Hopping that the day will never come. And remember to: PUT SAFTEY FIRST!
     
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  2. happychem

    happychem
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    redorkulated

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    PO4 test:
    Sulfuric acid: 4.5moles/L (ca. 450g/L)
    corrosive & harmful if swallowed
    http://ptcl.chem.ox.ac.uk/MSDS/SU/sulfuric_acid_concentrated.html

    Ammonium heptamolybdate tetrahydrate
    harmful if swallowed
    http://ptcl.chem.ox.ac.uk/MSDS/AM/ammonium_molybdate_tetrahydrate.html

    Potassium antimony tartrate
    harful if swallowed & corrosive
    http://physchem.ox.ac.uk/MSDS/AN/antimony_potassium_tartrate_trihydrate.html

    Compounds which interfere with test:
    Silicate if present at concentrations greater than 350umol/L (about 32ppm) and/or if left standing for more than 5 minutes

    Arsenate, but unlikely at natural concentrations

    Hydrogen sulphide, if greater than 60umol/L (about 2ppm), requires anoxic conditions.

    NO3 if around or greater than 124ppm, but you've got bigger problems then!

    Also, high copper content (more than 160umol/L, about 10ppm) will reduce the colour.
    -----------------------------------------------------
    Interferences with NO2:
    Sulphide ions, again, needs anoxic conditions
    -----------------------------------------------------
    Interferences with NO3:
    Same as NO2, since the same chemistry is occurring.
    -----------------------------------------------------
    Interferences with NH3: - Indophenol (blue colour) method
    Amino acids
    mercury(II) as low as 2ppm can interfere
    Salinity, if using a fresh water kit in a brakish/marine system

    Correction for salinity:
    NH3 (corrected)=(1+0.0073*Salinity)*NH3 (uncorrected)

    If the kit is marine, the replace "Salinity" with (Salinity-Salinity of Standards), if appropriate.
    -----------------------------------------------------
    Reference: "Methods of Seawater Analysis Third, Completely Revised Extended Edition" ed. K. Grasshoff, K. Kremling, and M. Ehrhardt, 1999, New York
     
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    #2 happychem, Mar 10, 2005
    Last edited: Mar 10, 2005
  3. beviking

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    h.c., do these compounds interfere with all tests or just those listed above respectively?
     
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  4. happychem

    happychem
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    No, those were specific to PO4, I did list interferences for some other tests, I'll bold-up the fonts for the individual tests.
     
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  5. spinjector

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    I have the Aquarium Pharmaceuticals Freshwater Master Test Kit, plus a few others, and I do have to admit I've burned my fingers a time or two with the acids in the kits. It wasn't serious either time, but I did wash my fingers well with cool water once I realized what was going on, and everything was ok.
     
  6. happychem

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    Hehe, I've dumped enough different acids and solvents on my hands at one time or another to understand that! Working in a lab is hard on the hands!
     
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  7. RTR

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    And the clothes unless you have scubs provided.
     
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  8. happychem

    happychem
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    Yup, lost a good shirt to some HNO3
     
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  9. Swimfins

    Swimfins
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    This is as good as it gets.

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    Interesting

    Don't forget about the dangers of mixing chlorine and ammonia:

    Look here


    When people cycle their tanks using ammonia, watch where you keep your bleach.
     
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  10. iamchris

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    The link goes to Sodium Hypochlorite...oops :p
     
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