B&W testing concerns me

[sifp]

I tested my B&M sn. The BW one that has >98 on the safety sheet.

I used the testing procedure in vizzy's guide.

Here are the results. The more concentrated result is from the 5g/L solution and the less concentrated one is from the 10 mg/L solution.

The 5g/L strip looks like it reads around 5 and 10 mg/L and the 10 mg/L strip doesn't even register.

I followed the procedure to a T but it looks to me like there is negligible amounts of sn in it. I used two different brands of test strip. Thoughts? Anyone else tested?

 

[pleaseletmeleave]

Oh no! I haven't tested mine because I've been too scared to open the jar and expose it to air. Did you use distilled water? Someone on this site (presumably) passed using that brand one so I thought it was good. But now I'm worried

 

[sifp]

Ya I used distilled water. Could always try again. I bought from mic because now I'm worried.

 

[pleaseletmeleave]

It's strange though if it failed 2 different brand strips. I'll try and test mine soon and compare. I have from mic and it seems to have passed but I'm still somewhat worried about its purity (it showed high nitrate results along with the nitrite) so I thought having this one as a backup was a safe bet but maybe not