Resource Testing SN using the Griess reaction over test strip?

[tooafraidtodiez]

So instead of buying an aquarium test strip, i bought a specific nitrite test kit that uses the Griess reaction. So basically, you get a vial and there are 2 reagent solution bottle. The testing is very simple, you fill the vial with water then mix your SN, drop 7 solution of ReAg bottle 1, wait 10 sec, drop 7 solution of ReAg bottle 2 then close the vial and shake gently. Wait for color change then match color change with the color chart they provided. I got dark brown which isn't in the color chart but that's because i messed up my solution drop (i have fixed it now). According to AI dark brown or deep red is good it indicates that your SN is high purity, also they told that the Griess reaction won't work on non nitrite solution. So let's say you got sodium azide or sodium nitrate the color will most likely stay yellowish pale. Is this method viable? I know it can't fully measure the purity but it can at least tell whether what you have is sodium nitrite or not. What's the advantage of aquarium strip test over this? Any insights is appreciated

 

[unkown00]

The tube one is better because you have a more even reaction in the tube through mixing, allowing a more accurate approximation of the concentration by looking at the colour change through the tube. The strip and tube have the same reaction, its just confined differently leading to less accuracy with the strip. I just asked AI the difference.

When you test with the tube is it still brown/reddish-brown? I'd assume that means its concentrated? If you dilute it with water does it match the red color on the strip better?

 

[tooafraidtodiez]

The tube one is better because you have a more even reaction in the tube through mixing, allowing a more accurate approximation of the concentration by looking at the colour change through the tube. The strip and tube have the same reaction, its just confined differently leading to less accuracy with the strip. I just asked AI the difference.

When you test with the tube is it still brown/reddish-brown? I'd assume that means its concentrated? If you dilute it with water does it match the red color on the strip better?

Mine came out red after following AI instruction. But it's pretty inaccurate so i just decided to get a test strip.