• Removing rust mark on wet room floor

    From Chris Green@21:1/5 to All on Mon Jan 13 09:31:44 2025
    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.

    --
    Chris Green
    ·

    --- SoupGate-Win32 v1.05
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  • From Jeff Layman@21:1/5 to Andy Burns on Mon Jan 13 10:59:49 2025
    On 13/01/2025 10:27, Andy Burns wrote:
    Chris Green wrote:

    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.
    weapon of choice from
    scotchbrite pad
    steel pan scourer
    magic eraser

    together with potion of choice from
    white vinegar
    viakal
    whink stain remover (weak HF acid)

    I am amazed that it is possible to buy a product containing hydrofluoric
    acid (I think that glass etching kits contain something else), but I
    couldn't find out what the strength is. I'd wear nitrile gloves at least
    while applying it, and keep any liquid well away from glass!

    --
    Jeff

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  • From Andy Burns@21:1/5 to Chris Green on Mon Jan 13 10:27:00 2025
    Chris Green wrote:

    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.
    weapon of choice from
    scotchbrite pad
    steel pan scourer
    magic eraser

    together with potion of choice from
    white vinegar
    viakal
    whink stain remover (weak HF acid)

    take it gently and stat in inconspicuous corner ...

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  • From Theo@21:1/5 to Chris Green on Mon Jan 13 11:57:30 2025
    Chris Green <cl@isbd.net> wrote:
    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.

    I think that's vinyl flooring?

    I've been looking into citric acid based chelating agents recently for derusting metal parts - eg a mixture of citric acid and sodium bicarbonate
    can be made up to be a pH neutral buffer so as to not attack the metal, but still chelate the rust. Somebody did some trials and it worked well:

    https://www.youtube.com/watch?v=fVYZmeReKKY

    The idea between chelation is that it grabs the rust and pulls it into solution, exposing the fresh rust behind. Repeat until all the rust is
    gone - you end up with clean metal and some black sediment.

    So if you have some citric acid you could try it on the rusty stain. Being vinyl the citric won't attack it so doesn't need the buffer.

    Theo

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  • From jon@21:1/5 to Jeff Layman on Mon Jan 13 12:20:15 2025
    On Mon, 13 Jan 2025 10:59:49 +0000, Jeff Layman wrote:

    On 13/01/2025 10:27, Andy Burns wrote:
    Chris Green wrote:

    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.
    weapon of choice from
    scotchbrite pad steel pan scourer magic eraser

    together with potion of choice from
    white vinegar viakal whink stain remover (weak HF acid)

    I am amazed that it is possible to buy a product containing hydrofluoric
    acid (I think that glass etching kits contain something else), but I
    couldn't find out what the strength is. I'd wear nitrile gloves at least while applying it, and keep any liquid well away from glass!


    Definitely need Eye and Skin protection and keep your mouth closed.

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  • From Spike@21:1/5 to Chris Green on Mon Jan 13 12:23:03 2025
    Chris Green <cl@isbd.net> wrote:

    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.

    Rub it over with a mixture of cut lemon and elbow grease.

    --
    Spike

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  • From Andy Burns@21:1/5 to Jeff Layman on Mon Jan 13 12:32:52 2025
    Jeff Layman wrote:

    I am amazed that it is possible to buy a product containing hydrofluoric
    acid (I think that glass etching kits contain something else), but I
    couldn't find out what the strength is.

    <https://amazon.co.uk/dp/B000ZZYUE2>

    Under 2.3% according to MSDS

    <https://web.faa.illinois.edu/app/uploads/sites/6/2021/05/WHINK-Rust-Stain-Remover.pdf>

    I'd wear nitrile gloves at least
    while applying it, and keep any liquid well away from glass!

    Good plan.

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  • From Alan J. Wylie@21:1/5 to Chris Green on Mon Jan 13 13:48:24 2025
    Chris Green <cl@isbd.net> writes:

    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.

    https://barkeepersfriend.com/ (mainly oxalic acid)

    --
    Alan J. Wylie https://www.wylie.me.uk/ mailto:<alan@wylie.me.uk>

    Dance like no-one's watching. / Encrypt like everyone is.
    Security is inversely proportional to convenience

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  • From brian@21:1/5 to All on Mon Jan 13 15:54:05 2025
    In message <053f5l-n6hu.ln1@q957.zbmc.eu>, Chris Green <cl@isbd.net>
    writes
    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.


    I did this recently - lavvy brush holder was the culprit. . Light scour
    with steel wool and bleach.

    Brian
    --
    Brian Howie

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  • From Peter Johnson@21:1/5 to All on Mon Jan 13 15:42:29 2025
    On Mon, 13 Jan 2025 13:48:24 +0000, "Alan J. Wylie" <alan@wylie.me.uk>
    wrote:

    Chris Green <cl@isbd.net> writes:

    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.

    https://barkeepersfriend.com/ (mainly oxalic acid)

    +1 I had satisfactory results with that recently, when I had skid
    marks from a reciprocating saw (don't ask) on tiles.

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  • From Fredxx@21:1/5 to Theo on Mon Jan 13 16:51:06 2025
    On 13/01/2025 11:57, Theo wrote:
    Chris Green <cl@isbd.net> wrote:
    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.

    I think that's vinyl flooring?

    I've been looking into citric acid based chelating agents recently for derusting metal parts - eg a mixture of citric acid and sodium bicarbonate can be made up to be a pH neutral buffer so as to not attack the metal, but still chelate the rust. Somebody did some trials and it worked well:

    https://www.youtube.com/watch?v=fVYZmeReKKY

    The idea between chelation is that it grabs the rust and pulls it into solution, exposing the fresh rust behind. Repeat until all the rust is
    gone - you end up with clean metal and some black sediment.

    So if you have some citric acid you could try it on the rusty stain. Being vinyl the citric won't attack it so doesn't need the buffer.

    Thanks for the video. I was aware of Evaporust and per Ed China bath of
    the stuff to de-rust a chassis that some calculated at £20,000 worth of Evaporust.

    But I wasn't aware how effective the combination of citric acid and a
    buffer was in comparison.

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  • From Andy Burns@21:1/5 to Fredxx on Mon Jan 13 17:45:03 2025
    Fredxx wrote:

    I was aware of Evaporust and per Ed China bath of
    the stuff to de-rust a chassis that some calculated at £20,000 worth of Evaporust.

    But I wasn't aware how effective the combination of citric acid and a
    buffer was in comparison.

    There's a chap* who apparently has has easy access to slip unofficial
    samples through a uni's mass spectrometers, he does youtube shorts
    analysing everything from fast food and nicotine gum, to chemicals such
    as Evaporust, he says the chelating ingredient is triethanolamine
    phosphate ...



    [*] <https://ucimsf.ps.uci.edu/personnel/48-ben-katz>

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  • From Theo@21:1/5 to Fredxx on Mon Jan 13 18:11:50 2025
    Fredxx <fredxx@spam.invalid> wrote:
    Thanks for the video. I was aware of Evaporust and per Ed China bath of
    the stuff to de-rust a chassis that some calculated at £20,000 worth of Evaporust.

    But I wasn't aware how effective the combination of citric acid and a
    buffer was in comparison.

    Yes, I saw that video and worked out how much it cost. That started me on a little detour about low cost alternative solutions. Various folks suggest citric based derusting, but they don't address the acidity. Some use EDTA, which is still a bit annoying to get hold of. So I started pondering about buffer solutions using household chemicals... thought about bicarb,
    searched and found that video demonstrating it works very well.

    I've also been looking at rust proofing solutions - the current heavily advertised product is 'Lanoguard', which is lanolin in a solvent. Lanolin seems to be useful as an oil that polymerises into a coating and can be regularly reapplied. It turns out there are a variety of third party
    lanolin based products for a fraction of the price. One of the 'homebrew' videos is pure lanolin plus a proprietary 'thinner', which turns out to be
    D100 solvent ('C13-C15 paraffins and naphthenes'), so I reckon lanolin plus white spirit ('Hydrocarbons, C9-C12, n-alkanes, isoalkanes, cyclics,
    aromatics (2-25%) 100%') would be worth a try. Although supposedly
    lanoguard doesn't attack plastics which white spirit might - maybe their solvent is better.

    Anyhow, this is a job for the summer...

    Theo

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  • From Jeff Layman@21:1/5 to Theo on Mon Jan 13 18:23:40 2025
    On 13/01/2025 18:11, Theo wrote:
    Fredxx <fredxx@spam.invalid> wrote:
    Thanks for the video. I was aware of Evaporust and per Ed China bath of
    the stuff to de-rust a chassis that some calculated at £20,000 worth of
    Evaporust.

    But I wasn't aware how effective the combination of citric acid and a
    buffer was in comparison.

    Yes, I saw that video and worked out how much it cost. That started me on a little detour about low cost alternative solutions. Various folks suggest citric based derusting, but they don't address the acidity. Some use EDTA, which is still a bit annoying to get hold of.

    It's available from Amazon, and isn't too expensive. e.g. <https://www.amazon.co.uk/MYOC-Disodium-Cosmetic-Conditioner-Facewashes/dp/B0B9S9YK5J?>

    --
    Jeff

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  • From Theo@21:1/5 to Andy Burns on Mon Jan 13 18:20:28 2025
    Andy Burns <usenet@andyburns.uk> wrote:
    Fredxx wrote:

    I was aware of Evaporust and per Ed China bath of
    the stuff to de-rust a chassis that some calculated at £20,000 worth of Evaporust.

    But I wasn't aware how effective the combination of citric acid and a buffer was in comparison.

    There's a chap* who apparently has has easy access to slip unofficial
    samples through a uni's mass spectrometers, he does youtube shorts
    analysing everything from fast food and nicotine gum, to chemicals such
    as Evaporust, he says the chelating ingredient is triethanolamine
    phosphate ...

    Yes:
    https://www.youtube.com/watch?v=X6-uxmwn43Y

    That's also what they say on the EU MSDS, where they can't hide behind 'proprietary mixture of this and that' as they do in the US: https://docs.rs-online.com/f5f6/A700000009023164.pdf

    1-5% of 2,2′,2′′-Nitrilotriethanol == triethanolamine

    Also included are:

    <5% salt of an aliphatic acid
    <3% aliphatic carboxylic acid

    which makes it look like an acid-salt buffer solution. I think the acid
    may be citric, but I couldn't tell for sure. I think the triethanolamine
    may be the carrier for the chelating agents, rather than the active
    ingredient itself.

    Theo

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  • From Theo@21:1/5 to Jeff Layman on Mon Jan 13 18:48:58 2025
    Jeff Layman <Jeff@invalid.invalid> wrote:
    On 13/01/2025 18:11, Theo wrote:
    Fredxx <fredxx@spam.invalid> wrote:
    Thanks for the video. I was aware of Evaporust and per Ed China bath of
    the stuff to de-rust a chassis that some calculated at £20,000 worth of >> Evaporust.

    But I wasn't aware how effective the combination of citric acid and a
    buffer was in comparison.

    Yes, I saw that video and worked out how much it cost. That started me on a
    little detour about low cost alternative solutions. Various folks suggest citric based derusting, but they don't address the acidity. Some use EDTA, which is still a bit annoying to get hold of.

    It's available from Amazon, and isn't too expensive. e.g. <https://www.amazon.co.uk/MYOC-Disodium-Cosmetic-Conditioner-Facewashes/dp/B0B9S9YK5J?>

    13p a gram! Meanwhile bicarb is 0.33p a gram, 40x cheaper...

    Theo

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  • From alan_m@21:1/5 to brian on Tue Jan 14 00:14:57 2025
    On 13/01/2025 15:54, brian wrote:
    In message <053f5l-n6hu.ln1@q957.zbmc.eu>, Chris Green <cl@isbd.net> writes
    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.


    I did this recently - lavvy brush holder was the culprit. . Light scour
    with steel wool and bleach.

    Bleach for rust IS NOT recommended!

    Just Google "Bleach and Rust" to bring up many hits for the reason not
    to use it.

    --
    mailto : news {at} admac {dot} myzen {dot} co {dot} uk

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  • From Thomas Prufer@21:1/5 to All on Tue Jan 14 09:14:07 2025
    On 13 Jan 2025 18:11:50 +0000 (GMT), Theo <theom+news@chiark.greenend.org.uk> wrote:

    I've also been looking at rust proofing solutions - the current heavily >advertised product is 'Lanoguard', which is lanolin in a solvent.

    I use "Cosmoloid H80" -- a "microcrystalline wax", whatever that may be.

    This can be applied to hot metal, or dissolved in white spirit/Stoddard solvent/thinner/whatever.

    I use "Shellsol T" which is an alkane solvent free of aromatics (doesn't smell, plus less toxic), at 20 grams Cosmoloid to one liter -- a very little Cosmoloid goes a long way. Treated metal is not greasy or waxy to the touch.


    Thomas Prufer

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  • From wasbit@21:1/5 to Theo on Tue Jan 14 10:50:29 2025
    On 13/01/2025 11:57, Theo wrote:
    Chris Green <cl@isbd.net> wrote:
    Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.

    I think that's vinyl flooring?

    I've been looking into citric acid based chelating agents recently for derusting metal parts - eg a mixture of citric acid and sodium bicarbonate can be made up to be a pH neutral buffer so as to not attack the metal, but still chelate the rust. Somebody did some trials and it worked well:

    https://www.youtube.com/watch?v=fVYZmeReKKY

    The idea between chelation is that it grabs the rust and pulls it into solution, exposing the fresh rust behind. Repeat until all the rust is
    gone - you end up with clean metal and some black sediment.

    So if you have some citric acid you could try it on the rusty stain. Being vinyl the citric won't attack it so doesn't need the buffer.


    Thanks.
    I have been using electrolysis to remove rust but yours seems to be a
    quicker & easier solution (no pun intended).



    --
    Regards
    wasbit

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  • From Theo@21:1/5 to Thomas Prufer on Tue Jan 14 11:03:43 2025
    Thomas Prufer <prufer.public@mnet-online.de.invalid> wrote:
    On 13 Jan 2025 18:11:50 +0000 (GMT), Theo <theom+news@chiark.greenend.org.uk> wrote:

    I've also been looking at rust proofing solutions - the current heavily >advertised product is 'Lanoguard', which is lanolin in a solvent.

    I use "Cosmoloid H80" -- a "microcrystalline wax", whatever that may be.

    This can be applied to hot metal, or dissolved in white spirit/Stoddard solvent/thinner/whatever.

    I use "Shellsol T" which is an alkane solvent free of aromatics (doesn't smell,
    plus less toxic), at 20 grams Cosmoloid to one liter -- a very little Cosmoloid
    goes a long way. Treated metal is not greasy or waxy to the touch.

    Yes, I was wondering if there was a generic purer alkane solvent like
    Shellsol. Trouble is that it's only sold in art supply places at about £18
    a litre, which makes it quite pricey. Bulk price in 1000 litres is about £1.40 a
    litre so that's quite some markup.

    There's also 'turpentine substitute' which is fairly cheap, but that appears to be
    just a less pure version of white spirit.

    Theo

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  • From Thomas Prufer@21:1/5 to All on Tue Jan 14 17:41:42 2025
    On 14 Jan 2025 11:03:43 +0000 (GMT), Theo <theom+news@chiark.greenend.org.uk> wrote:

    Thomas Prufer <prufer.public@mnet-online.de.invalid> wrote:
    On 13 Jan 2025 18:11:50 +0000 (GMT), Theo <theom+news@chiark.greenend.org.uk>
    wrote:

    I've also been looking at rust proofing solutions - the current heavily
    advertised product is 'Lanoguard', which is lanolin in a solvent.

    I use "Cosmoloid H80" -- a "microcrystalline wax", whatever that may be.

    This can be applied to hot metal, or dissolved in white spirit/Stoddard
    solvent/thinner/whatever.

    I use "Shellsol T" which is an alkane solvent free of aromatics (doesn't smell,
    plus less toxic), at 20 grams Cosmoloid to one liter -- a very little Cosmoloid
    goes a long way. Treated metal is not greasy or waxy to the touch.

    Yes, I was wondering if there was a generic purer alkane solvent like >Shellsol. Trouble is that it's only sold in art supply places at about £18 >a litre, which makes it quite pricey. Bulk price in 1000 litres is about £1.40 a
    litre so that's quite some markup.

    There's also 'turpentine substitute' which is fairly cheap, but that appears to be
    just a less pure version of white spirit.

    Theo

    Charcoal lighter fluid is low on odour, though a bit oilier (higher boiling point?) that thinner, and will sometimes substitute for thinners. And it is easily available, at least in summer.


    Thomas Prufer

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  • From Theo@21:1/5 to Thomas Prufer on Tue Jan 14 17:02:40 2025
    Thomas Prufer <prufer.public@mnet-online.de.invalid> wrote:
    On 14 Jan 2025 11:03:43 +0000 (GMT), Theo <theom+news@chiark.greenend.org.uk> wrote:

    Thomas Prufer <prufer.public@mnet-online.de.invalid> wrote:
    On 13 Jan 2025 18:11:50 +0000 (GMT), Theo <theom+news@chiark.greenend.org.uk>
    wrote:

    I've also been looking at rust proofing solutions - the current heavily >> >advertised product is 'Lanoguard', which is lanolin in a solvent.

    I use "Cosmoloid H80" -- a "microcrystalline wax", whatever that may be. >>
    This can be applied to hot metal, or dissolved in white spirit/Stoddard
    solvent/thinner/whatever.

    I use "Shellsol T" which is an alkane solvent free of aromatics (doesn't smell,
    plus less toxic), at 20 grams Cosmoloid to one liter -- a very little Cosmoloid
    goes a long way. Treated metal is not greasy or waxy to the touch.

    Yes, I was wondering if there was a generic purer alkane solvent like >Shellsol. Trouble is that it's only sold in art supply places at about £18 >a litre, which makes it quite pricey. Bulk price in 1000 litres is about £1.40 a
    litre so that's quite some markup.

    There's also 'turpentine substitute' which is fairly cheap, but that appears to be
    just a less pure version of white spirit.

    Theo

    Charcoal lighter fluid is low on odour, though a bit oilier (higher boiling point?) that thinner, and will sometimes substitute for thinners. And it is easily available, at least in summer.

    Hmm, I wonder how pure that is (I expect not very), and whether that matters? "100% Hydrocarbons, C11-C14, n-alkanes, isoalkanes, cyclics, <2% aromatics. " according to: https://www.bartoline.co.uk/wp-content/uploads/2018/08/BARBECUE-LIGHTING-FLUID-SDS10059.pdf
    so seems pretty similar to white spirit.

    One of the proprietary solvents, 'Corrolan Turbo': https://www.rust.co.uk/product/corrolan-turbo-thinner-cleaner/

    lists 'D100 solvent' (= Shellsol D100) on the MSDS but doesn't say whether
    it's 100% or has other things in it. It's about £6/litre which is better
    than £18. Maybe it's just not possible to buy industrial Shellsol in
    smaller than a barrel?

    Theo

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  • From brian@21:1/5 to junk@admac.myzen.co.uk on Wed Jan 15 08:41:53 2025
    In message <lulok1Fmnr8U1@mid.individual.net>, alan_m
    <junk@admac.myzen.co.uk> writes
    On 13/01/2025 15:54, brian wrote:
    In message <053f5l-n6hu.ln1@q957.zbmc.eu>, Chris Green <cl@isbd.net> writes >>> Is there any quick and easy way to remove a rust mark from a wet room
    floor? The floor is some sort of 'one piece' standard wet room floor,
    it's not tiled.

    I did this recently - lavvy brush holder was the culprit. . Light
    scour with steel wool and bleach.

    Bleach for rust IS NOT recommended!

    Just Google "Bleach and Rust" to bring up many hits for the reason not
    to use it.


    It seemed to have removed it OK . Maybe just a surface mark and I got
    lucky

    Tnx

    Brian
    --
    Brian Howie

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  • From Theo@21:1/5 to Theo on Wed Jan 15 21:50:25 2025
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Yes:
    https://www.youtube.com/watch?v=X6-uxmwn43Y

    That's also what they say on the EU MSDS, where they can't hide behind 'proprietary mixture of this and that' as they do in the US: https://docs.rs-online.com/f5f6/A700000009023164.pdf

    1-5% of 2,2′,2′′-Nitrilotriethanol == triethanolamine

    Also included are:

    <5% salt of an aliphatic acid
    <3% aliphatic carboxylic acid

    which makes it look like an acid-salt buffer solution. I think the acid
    may be citric, but I couldn't tell for sure. I think the triethanolamine
    may be the carrier for the chelating agents, rather than the active ingredient itself.

    Ah, the MSDS for the gel has: https://www.crcindustries.com/media/msdsen/msds_en-1752903.pdf

    water 55 - 65%
    triethanolamine phosphate 20 - 30%
    aluminium sulphate 1 - 5%
    citric acid 1 - 5%
    dipropylene glycol methyl ether 1 - 5

    Wikipedia says something interesting:

    "Another common use of TEOA [triethanolamine] is as a complexing agent for aluminium ions in aqueous solutions. This reaction is often used to mask
    such ions before complexometric titrations with another chelating agent such
    as EDTA"

    so maybe some kind of aluminium sulphate + TEOA + citric chelating is going on... I probably need to spend some time understanding the chemistry better.

    Theo

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