Method Nitrite testing (SN method)

[beseechgod]

In this post I'm sharing my thought process and questions related to SN testing.

Basically I'm trying to figure out:
1. Whether it's worth it to do this in the first place.
2. What type of test kit to get.
3. What brand/specific product to get.

The most comprehensive source of information on the SN method I have found is "Vizzy's SN Bible." This seems to be the SN info source most often referenced by users here. From what I've seen there and on the forum in general, it seems highly recommended to test the purity of your SN with "nitrite test strips/kits" before using it.

This may or may not be necessary, but I figured I might as well take all possible precautions. So now I'm trying to decide what type of test kit I should get, if any.
I've noticed comments (and general opinions) which question the accuracy of these tests. Some people seem to think they're unreliable.

However, I think all of those comments were referring to "strip" tests specifically, which are apparently different from "reagent" tests.
What I've gathered is that two types of nitrate tests are available: strips and reagents. Would I be correct in saying that?

Another opinion I've noticed from users on the forum is that reagent tests are more reliable than strip tests.
This leads me to wonder whether I should use a reagent test rather than a strip test, even though the latter is the one outlined in Vizzy's guide, supposedly the PPEH, and the other testing procedure guides I've found.
I haven't found any recommended guides outlining reagent testing procedure. I'm wondering if there's a reason they focus on strip testing rather than reagent testing, if reagent testing is supposedly more reliable?

The last thing I'll have to figure out is what brand/specific product would be best. I've found several different ones through recommendations from the forum (both strip and reagent types I think, though I can't always tell what kind they are).
But it's hard to know. First I'll have to understand the difference between the types of tests and how to distinguish them when looking for what product to buy.
(If anyone has any recommendations or wants me to share the ones I found let me know.)

 

[Moash]

Knowing stuff is great and all but i can't buy them , like Domperidone is not otc in Canada so i don't know where to get it. I wish there was easier ways that I could do it safely. Thanks for info btw.

 

[SchrodingerIsDed]

In this post I'm sharing my thought process and questions related to SN testing.

Basically I'm trying to figure out:
1. Whether it's worth it to do this in the first place.
2. What type of test kit to get.
3. What brand/specific product to get.

The most comprehensive source of information on the SN method I have found is "Vizzy's SN Bible." This seems to be the SN info source most often referenced by users here. From what I've seen there and on the forum in general, it seems highly recommended to test the purity of your SN with "nitrite test strips/kits" before using it.

This may or may not be necessary, but I figured I might as well take all possible precautions. So now I'm trying to decide what type of test kit I should get, if any.
I've noticed comments (and general opinions) which question the accuracy of these tests. Some people seem to think they're unreliable.

However, I think all of those comments were referring to "strip" tests specifically, which are apparently different from "reagent" tests.
What I've gathered is that two types of nitrate tests are available: strips and reagents. Would I be correct in saying that?

Another opinion I've noticed from users on the forum is that reagent tests are more reliable than strip tests.
This leads me to wonder whether I should use a reagent test rather than a strip test, even though the latter is the one outlined in Vizzy's guide, supposedly the PPEH, and the other testing procedure guides I've found.
I haven't found any recommended guides outlining reagent testing procedure. I'm wondering if there's a reason they focus on strip testing rather than reagent testing, if reagent testing is supposedly more reliable?

The last thing I'll have to figure out is what brand/specific product would be best. I've found several different ones through recommendations from the forum (both strip and reagent types I think, though I can't always tell what kind they are).
But it's hard to know. First I'll have to understand the difference between the types of tests and how to distinguish them when looking for what product to buy.
(If anyone has any recommendations or wants me to share the ones I found let me know.)

I'm very glad I did a strip test. They came back negative for products that were sold as 99% sn. It actually just confused me, because the strips turn to a color indicating maybe 15ppm or 25ppm while in the 25g diluted in 1L of water, but when I take the strips out, they immediately show negative, even though the strips state.

Also evidentally there was some confusion on what exactly the test strips are testing: leading to a one-third overestimation. Blood test was negative or at least inconclusive. Melting point test was also negative.

In essence, I have no fking clue. I have two products and 3 batches of sn, one of which outright advertised 99% purity and the other just came up when searching for 99%, and both test negative with the test strips. -.- The VERY strange thing is that they also tested negative for nitrates.......what? I don't know if I'm doing something wrong, but I don't know how you can get dipping a test strip in water wrong.

Additionally, I had a different batch that did not fully dissolve in water, and that's a really easy way to tell that it's probably bunk. Pure sn should dissolve perfectly in water.

 

[SummerSolesLongLost]

Other thing you can try is put a bit of the SN in a bowl outside or in a testing tube and using a dropper put a little H₂SO₄ (sulfric acid) on it. If it bubble and there is a brown kind of gas then there are at least some nitrites there. If nothing then its for sure a dud. Look up the reaction on youtube to see what it should look like.

 

[SchrodingerIsDed]

Other thing you can try is put a bit of the SN in a bowl outside or in a testing tube and using a dropper put a little H₂SO₄ (sulfric acid) on it. If it bubble and there is a brown kind of gas then there are at least some nitrites there. If nothing then its for sure a dud. Look up the reaction on youtube to see what it should look like.

This will also generate nitrogen oxide which is dangerous if inhaled, so be cautious. Definitely outside. Won't kill you but it can be pretty irritating to the lungs, so I've read.

 

[TurboCharcha]

Also evidentally there was some confusion on what exactly the test strips are testing: leading to a one-third overestimation.

Thanks for referencing this. It is very important to let everyone know that nitrite strips and kits do not measure sodium nitrite concentration, but nitrite ion concentration. Assuming they measure SN concentration directly (equivalent to assuming the nitrite ion concentration is one third higher than what it actually is) is wrong and leads to results below expected.