While the osmolar concentration of soap and water solutions might be interesting, as Switchablesusie points out, it is very unlikely to meaningful for anything.
With all due respect I still think it a sincere yet rather blunt statement. Even if I'll likely come to pin to my knowledge base the notion that working out a bit of experimentation and subsequently sticking with product of choice and concentration which gives agreeable results according to my own expectations is the only way to deal with soapsuds, the core reason behind my request for reliable information as per thread's title is that I indeed praise the credentials of Zity members connected with medical/nursing environment or versed in chemistry enough to help determining whether such a calculation would be feasible. I also was calling for some clarity by throwing on the table my thought in order to help whoever might be concerned by possible side effects of retaining a soapsuds enema for reasonably long bouts of time. In search of the elusive data I've been gathering information throughout books and websites for years and couldn't find any reliable reference, so here I was.
When soap solutions are talked about, they are generally discussed in terms of percentage soap by weight and my recollection is the suggestion for enema is about .7%. That corresponds to a 10gm soap packet in 1500ml of water.
I never tried packet soap so I can't compare data. Given my previous experiences with a few other favorite recipes whose I often reserve long retention periods, it's not that long since I've come to grasp and savor the main trait of how a soapsuds enema acts on my own innards. Even without experiencing no cramps at all as with the concentrations I tried out until now (ranging from 5 to 8 ml per liter, rather bland compared to the one used by people whose dosage according to various posts amounts to tablespoons instead ot teaspoons), I won't retain such an enema more than a couple minutes beyond my average 15-minute administration time and that's that. But unless they're bragging about it, I read of many members who take more than two quarts of strong soapsuds trying to retain them as long as they can. This alone sprang some thoughts about the overcome of soap compounds being possibly absorbed in the bloodstream should the soap solution at a given concentration turn out to be rather hypotonic. In another post I read of people tasting peppermint after the enema so it seems that some essential oils added to scent the soap are able to reach the bloodstream hence the related triggering of tastebuds as Susie explained in more than one posts. Conversely, the already proved feature of soap solutions to give more complete returns along with a temporary stripping effect on colon epithelium's surface layer could even hint at the opposite - unless colon lining show this behavior uniquely in reaction to the strong muscular exertions elicited. I don't have a degree in biochemistry yet even as a blunt layman I'd tend to think that this apparent mismatch could hint elsewhere judging by the amount of clean mucus, allegedly 'squeezed' from colon linings, I expel with the last spurts of a mild soapsuds enema, If that's what happens, it did pass unnoticed if not for the detailed feeling of my peristalsis being 'put in line' throughout the release so to say, i.e. at perfectly phased pace.
Maybe I already discovered the ideal proportions for my taste within my first attempts. So if it's that well let's be it - no more questions, put it under belt, smile and move on... ;-)
Osmolar concentration could be quite difficult to determine, as you would need to know the molecular weight of the soap molecule.
I see. I was just wondering whether anyone did already attempt at gaining a bit of consistency by limiting the analysis on a single soap. For example, both the soap in premeasured packets and Dr. Bronner's would present the twofold advantage of being liquid (easy to measure out) and consistent in concentration (easy to work out dilutions).
This is further complicated by the fact that many commercial bar soaps are not a single soap molecule [...] 5 different Salts of Fatty Acids (soaps) [...] Fatty acids come in a huge range of configurations and molecular weights, so there may be VAST differences between the molecular weights of the various soaps in the product.
I've always been puzzled by such intermingling data so I thank you for adding further bits of information to common knowledge to begin with. As for the soap packets I guess you're relating to PDI, Triad, Tri Leaf etc. which composition (part of, actually) I already retrieved. But since hereabout such products have always been hard to find and nowadays are gone even from hospitals, I had to wait until Dr. Bronner's became available. Long before my first forays into soapsuds enemas I already had found genuine castile soapbars, free of perfumes and any chemicals unrelated to plain soapmaking process, which proved to be a blessing for my dryish, thin skin. On the other hand for my first soapsuds enema I had already opted for liquid soap to allow me accurate enough dosage and not having to scrub lots of scum off my equipment.
Back to the subject, some time ago I gave a try to the forum's search function and I stumbled upon this post from a nameless account, maybe suspended:
[...] There was a paper done a few years back (I think Schmelzer was one of the authors, "Safety and Effectiveness of Large-Volume Enema Solutions") on how tap water enemas were absorbed to a certain degree, but soapsuds kept their volume and produced significantly better results. [2010.09.03 07:54]
I happen to have that paper, issued in 2004 and signed by four other researchers (three MDs and a RN). I had found its abstract on some website more than a decade ago. The study was about a clinical trial about enema administration involving soapsuds, tap water, and PEG-ES, comparing results under several parameters including biopsies of rectal tissue. Eager to know more upon the subject from the vantage point of a clinical study performed on volunteers with at least some steady line of features throughout, I emailed Prof. Marilee Schmelzer briefly explaining who I am and the reasons behind my interest since her fame bagan to spread beyond Arlington, TX. I asked her if she would be so kind to send me a copy of the paper and she did within short. Reading this ten-page report, extrapolated from Applied Nursing Research vol. 17, allowed me to confirm informations which I had already picked up from other sources and contributed to slacken my innate diffidence towards solutions which main feature have always been labelled with sentences more or less orbiting around the word 'irritation'. Among other data worth of mentioning there's the osmolality of the soapsuds solution employed throughout the study (6 g unidentified "liquid castile soap" in 1 l deionized water) which resulted inferior to that of colon's contents ending up being absorbed a little more than PEG enema (which being isotonic played the role of reference), but being absorbed much less than tap water. Alleged damage to colon lining was found as inconsistent, surely linked to both soapsuds and tap water yet also dependent upon other variables (hard stool, too-harsh solutions, individual issues). Interesting enough, among the conclusions is that further investigations are needed to better understand interactions between osmosis and chemical reactions (the mucosa stripping may point out to colon's natural tendence of getting rid of irritation by sending mucus cell into overdrive until some peels away) and trying to extricate the myriad of variables that leave cross-references. Also, hypotonic solutions such as tap water seem to promote mucosal damage more than isotonic solutions.
So besides giving rather consistent effectiveness within the study, at least soapsuds enemas turns out not to be public enema number one. Even without further investigation I am inclined to think that common sense wins here too. As I reassure myself, «enough to urge but not to purge», I imagine that many a klismo got to the same conclusions by feel but hey, what's wrong with inquiring among smart and educated people? :-)
The problem is further complicated by the fact in the presence of hard water, the calcium replaces the sodium in the soap molecule, and the soap becomes insoluble, resulting in 'soap scum'. If it isn't in solution, it doesn't contribute to osmolarity.
Got it, fairly easy to understand. I can only speak for myself here. Tap water in my town is fairly safe bacteriologically but it's rather hard. I never had the chance to perform a pH test on it but it doesn't take much to get an idea of how much limescale shows after boiling a pan of water, or the halo left on by a single droplet after evaporation. Also my washing machine, according to producer's directions, requires the highest water softener/detergent ratio each cycle. As a rough estimate, maybe I'll try to add another ml of two of soap to my solution to help counteract excess calcium carbonate and see if I experience any difference.
As a general consideration I'd rather tend to agree that the common way of doing some experimentation and adjusting the few parameters at hand surely brings trustful enough results. Then if after thorough reasoning I understand that calculations leading to data I'm searching about is nearly impossible to perform, well I just accept it as a fact of life - no arguments forwarded.
Drawing strings, unless this place happens to be a gathering of loonies or an almanac of human quirkiness centered upon self-inflicted discomfort (count me out please) I think no one should allow him/herself to utter harsh remarks out of the blue. There's a reason embracing both safety and comfort, not futile debate, behind my curiosity. Otherwise I sincerely apologise to the community for creating such an annoying nuisance, if you allow me to express myself out of my heart.
Heck, my sign proved to be a curse... :-D