Help Testing DMC SN in Spring Water

[wanttodie12345]

I tried testing SN from DMC in bottled spring water (don't have access to distilled). I tested the spring water first and no nitrites. But when I tested the solution I prepared following vizzy's guide, I'm getting readings closer to 5ppm instead of the expected 10ppm. I've read that spring water could still have chlorine in it, which may reduce nitrites. Anyone with knowledge about this?
Anyone test a recent DMC order?

 

[opheliaoveragain]

Bumping this out of curiosity.

 

[Soupster]

From a scientific point of view, spring water is a horrible medium for testing chemical purity as it contains many chemicals and minerals that can effect the outcome of your tests. Distilled water removes those impurities.

Distilled water is often readily available at grocery stores, etc.

 

[suffering_mo_7]

I used distilled water, tested DMC twice (2 different batches) and got the same as OP.....close to the 5 PPM. SD was the same, maybe a tad higher in nitrites and nitrates but still close to the 5 PPM. Not sure what to think......

 

[wanttodie12345]

I had the same results with SD in spring water. I am really trying to convince myself it's the water or my test strips (bartovation).
I will likely just attempt with DMC, since it has been effective for others.
Unfortunately I can't go to the store. I've gone through so many test strips (all the same brand). Slight color variations and one strip that was totally different than the others. Between the water and the strips, I figure I either have two SN that'll do just fine, or two that aren't pure enough. I'm sorry I'm being so anxiety ridden over this!

 

[wanttodie12345]

Thought it over some more. The two sources are obviously different manufacturers due to the consistency of the product. One is more "clumpy" and the other is more like dry sand . They were both advertised as the same purity (99 and 99.6). What are the chances two different manufacturers created exactly the same lower purity level products? Given the difficulty reading this particular brand of strips, and the variation I'm seeing in the color scale on different bottles posted here...
I mean, I really want these to be pure enough!

 

[huntermellow]

can't you just make distilled water yourself

 

[wanttodie12345]

can't you just make distilled water yourself

It is possible to do so, but I am disabled and also unable to do so without raising suspicion.

 

[TangentiallyAlive]

I tried testing SN from DMC in bottled spring water (don't have access to distilled). I tested the spring water first and no nitrites. But when I tested the solution I prepared following vizzy's guide, I'm getting readings closer to 5ppm instead of the expected 10ppm. I've read that spring water could still have chlorine in it, which may reduce nitrites. Anyone with knowledge about this?
Anyone test a recent DMC order?

would you be willing to take a picture of the packet that the SN came in to confirm that we are talking about the same DMC? It should contain no personal information on it.