7% Post Reaction Soap testing

[Tony]

Wow interesting results - now you're tempting me back to 7% prewash 

[Head Womble]

You've got to try this water washing lark, I'm absolutely sold on it.

[julesandtash]

Interesting that there was no change between washes two and three. To be honest, looking at your figures, there is nothing really to be gained after doing the first water wash.

The difference between 12.1 and 6.08ppm is negligible - 6ppm or 0.019ml of HCL which could almost be a measuring error.

I really must keep samples of mine on the next batch and record the results.
I did measure them but was in a rush and didn't write them down.
I seem to recall that it was not until the third wash that the soap values really started to plummet but then I was only doing 10 minute washes.

I will try a one hour prewash and a one hour water wash and see if that gives similar results to you.

How long do you leave it to settle between the prewash to first water wash and then between washes?

[Head Womble]

I like to leave it to settle for 2hrs, the first wash was left overnight.

[nigelb]

Mark..I see your raw bio sample is really low in ppm value again....almost to the same point of my fuel after the 7% wash. Your two samples are quite consistant, as are mine.....just the level of ppm that's different. Would it be possible for you to send me a sample of your raw fuel for me to test. I could do the same for you.

[Head Womble]

I think that would be a good idea Nige,
I'd like to get it checked by someone else as I'm not convinced my readings are right,
they just seem too low, I know your testing equipment is is probably more accurate than mine.

As we both do two stage non titration with ASM it's hard to see why are results are so far apart.

[Tony]

Mark is your post 7% measurement directly after the prewash or after the 2 hour settle?

[Head Womble]

Mark is your post 7% measurement directly after the prewash or after the 2 hour settle?

I don't get what you're asking mate.

[Tony]

Mark is your post 7% measurement directly after the prewash or after the 2 hour settle?

I don't get what you're asking mate.

Perhaps I'm misunderstanding your process?

Do you?

1 - add prewash water
2 - mix prewash water
3 - turn off pump
4 - settle and remove glycerol
5 - stand for two hours
6 - remove any extra settled glycerol
7 - start first wash

In which case if you sample the soap PPM after step 4 and 6 there might be a difference

Or do you leave the settling glycerol in for the whole two hours, then take a sample?

I hope you see what I mean!

[Head Womble]

I don't do 5 & 6.

[nigelb]

I think that would be a good idea Nige,
I'd like to get it checked by someone else as I'm not convinced my readings are right,
they just seem too low, I know your testing equipment is is probably more accurate than mine.

As we both do two stage non titration with ASM it's hard to see why are results are so far apart.

The basic test equipment I use is no different to the kit you have. The only difference for me...assuming you don't have one... is I use a magnetic stirrer and conical flask.

The important part of our two sets of results is the consistancy. ie there have been no wild swings in the results gained and the drop in ppm's have been expected.

[Tony]

How long do you leave it to settle between the prewash to first water wash and then between washes?

I like to leave it to settle for 2hrs, the first wash was left overnight.

Ah so you are only talking about between washes not prewash to first water wash?

[Head Womble]

How long do you leave it to settle between the prewash to first water wash and then between washes?

I like to leave it to settle for 2hrs, the first wash was left overnight.

Ah so you are only talking about between washes not prewash to first water wash?

Yes, sorry mate, I didn't read your first question properly.

[Head Womble]

I think that would be a good idea Nige,
I'd like to get it checked by someone else as I'm not convinced my readings are right,
they just seem too low, I know your testing equipment is is probably more accurate than mine.

As we both do two stage non titration with ASM it's hard to see why are results are so far apart.

The basic test equipment I use is no different to the kit you have. The only difference for me...assuming you don't have one... is I use a magnetic stirrer and conical flask.

The important part of our two sets of results is the consistancy. ie there have been no wild swings in the results gained and the drop in ppm's have been expected.

I know the results should be the same, but my results are unexpectedly low and it would be nice to have it tested independently as it were.

 

[Head Womble]

Nige, u2u me your address and I'll get some samples posted off.
I'll send you the raw bio, prewashed bio and the first wash as I think they are the most important ones for reference.