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Measuring PPM ( Parts per Million )
Colloidal Silver Concentration

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This section provides information documenting the various methods used to attempt to measure the concentration ( PPM ) of "home-brewed" colloidal silver. However, it should be noted that there is no way to properly and accurately measure or classify colloidal silver without professional testing. There is even a great discrepancy between results obtained from different labs who have tested the same products.

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Methods Commonly Used to Determine Concentration/Strength of Home Colloidal Silver

Laser Light Pen

H2O2 & Colloidal SilverUtilizing a laser light after colloidal silver production is a favorite method utilized by "home-brewers". While using a laser light to detect a tyndall effect in no way indicates the total concentration of colloidal silver, it does have several uses.

1. The presence of a tyndall effect indicates minute particles in suspension. When creating colloidal silver via the electrolysis method in distilled water, the tyndall effect demonstrates that the production of colloidal silver has been successful. Since most colloidal silver produced via LVDC ( Low Voltage Direct Current ) is between 80 - 85% ionic, the presence of a tyndal effect indicates the presence of both silver particles and ionic silver.


[ strong tyndall effect in a clear isolated silver solution ]

2. The tyndall effect via a laser light pen can provide those experienced with a method of quality control. Through trial and error, a user gains a feel for how strong a product is and should be, and the silver solution may be meticulously studied for tiny silver flakes and other particulate contaminants. Laser lights and video camera may be utilized to study how silver particles are dispersed into the water during production.

Pure Water Testing Meter ( Hanna PWT Meter )

Hanna PWT Meter for PPMUtilizing a Hanna PWT Meter to estimate the PPM of colloidal silver is one of the most valueable methods available without access to a laboratory.

Before making colloidal silver, the quality of the distilled water is measured. The best distilled water for making colloidal silver will read below 1.0 on the Hanna PWT Meter. The purest water we've tested ( via our own distillation ) read 0.2uS.

Since the PWT meter actually measures conductivity, near-accurate results depend upon the purity of the water, silver, and cleanliness of all equipment used during colloidal silver production.

Once the distilled water is checked for quality, it is a good idea to add the distilled water to the production vessel ( the colloidal silver generator ), wait about 2 minutes, and then re-check for contamination.

Make a note of the final reading. After production, let the colloidal silver sit for awhile, between 15 mins and an hour. Test the final product.

The equation for estimating the PPM of the colloidal silver is as follows:

( Final Meter Reading - Initial Distilled Water Reading ) X Adjustment/Conversion Factor = PPM Colloidal Silver.

A standard conversion factor used by many producers is 1.2; however, this number will not be entirely accurate, and depends upon many variables that cannot be easily isolated. The 1.2 specification applies to Silvergen Colloidal Silver Generators specifically, and was developed by comparing a laboratory analysis ( total silver content measured in PPM ) with readings from the Hanna PWT meter. Silvergen colloidal silver is 80-85% ionic, 15%-20% particulate. Keep in mind that the Hanna PWT meter will not register any particulate silver in the CS product; this is why a conversion factor is required.

Even if one has not had batches tested to properly classify and measure colloidal silver concentration, the Hanna PWT meter is still an excellent tool to assist the homebrewer with quality control. By making notes and developing a baseline, one can at least be certain that an end batch is within acceptable parameters.

View our Next Section: Properly Classifying Colloidal Silver | Analytical Studies

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1-15 of 18 Comments
Kane – USA
February 06, 2013 - 19:07
Subject: PPM Meter

I bought a TDS-EZ PPM Meter off of Amazon. It seems to work fine. The thing I'm having a hard time figuring out tho is the "ideal" PPM to use. Any ideas?
You can see the meter that I bought at the link below.
Thanks and good luck

David C – Oregon
January 23, 2013 - 02:57
Subject: Contaminating the colloidal silver.

Any metal such as the wires used or alligator clips will contaminate the water if allowed to touch water when electric current is on. Think electroplating. Also I wonder about using anything other than clean paper towel in wiping off the silver electrodes, which must be done every fifteen minutes more or less. A paper towel is somewhat abrasive on the soft silver, works well, I do not think iron from the steel wool is a good idea. We have found water maintained at temperature just under boiling works faster in producing yellow colloidal silver. Seems to take about one hour to start conducting electricity through the water, then it gets stronger more rapidly. We have tried two different methods for heating the water. First I heated it repeatedly in the microwave as seen on you tube. Second we used a deep fryer filled about 2/3 full of hot tap water then set a quart jar of hot distilled water in it. Later I made a lid with a round hole just the size to fit loosely around a quart jar (pie pan). This helps keep heat in the water and limits steam into the room. The thermostat maintains even temperature just under boiling. I use a small laser to "see" when the silver in the water begins to be visible. When it begins to be yellow in color to the unaided eye it is strong enough. We have not tried batteries as I had a small transformer which may have been a telephone charger in it's previous life. With an output of 9v 350ma DC. I used another transformer rated at 16v DC output and it was a bit faster. On the internet I have read others stating that 30v DC is about max to use as the higher current produces colloidal silver with larger particle size and the smaller sized particles is preferred. In any case I went back to the 9v DC transformer and it takes about 1 1/2 to 2 hours to produce a nice yellow quart of colloidal silver. We made one quart of dark yellow colloidal silver by running this for nearly three hours. Sealed the jar by applying a canning lid before it had cooled. This jar of dark yellow was stored on a shelf in the dark for observation. After about a week there was formation of dark particles on the bottom of the jar about the color of silver tarnish. A film of particles settling out of the liquid. It is probably not harmful but it does not look vary sanitary to consume. We have a jar sealed the same way when it was just beginning to turn yellow. It is in dark on shelf and after two months shows no sign of settling. Looks vary clean and clear when inspected with a flashlight. We usually make two quarts in a afternoon. Because of the need to wipe the electrodes every fifteen minutes it requires monitoring. We have begun to stop the process when we first see any yellow in the water. This seems to be as strong as necessary and also stores vary well.

Kiwi – New Zealand
January 05, 2013 - 22:33

The trick is to add a small amount of colloidal silver from a previous batch, (even if its a few drops, but preferably more) and this will help kick off the process.

Ifeanyichukwu – Owerri-Nigeria
March 08, 2012 - 04:47
Subject: Colloidal Silver water

Please,how can i get colloidal silver products(water) in Nigeria

Reply to Ifeanyichukwu
Roger Oh – Harringon Park
October 22, 2012 - 14:42
Subject: Re: Colloidal Silver water

Use three 9-volt Batteries and Distilled water only connect the batteries in series use 99.99% silver or better. I use two 99.999% Troy Silver Billions. Also get alligator clips to hold the silver in the water. Use one piece of the silver connected to the positive and the other connected to the negative end. Leave it in the water it will turn to a yellow color which is good. I have used it to stop gangrene, lose weight, kill bateria/virus, gum disease, c diff in my father, plus has given me a healthy feeling of goodness. I would have never believed it but, it does work. You will hear comments of a blue man from people but, he used a different silver which is made with regular water which creates large particles of silver because of the impurities in the water. If you try both waters you will see the difference. I use the one made from tap water and turn it into a topical paste with coconut oil as a antibacterial for cuts

Reply to Ifeanyichukwu
Soh Seow Hwa – Singapore
March 30, 2013 - 02:56
Subject: Re: Colloidal Silver water

I sell a device that will produce collodial silver in water. It is battery operated (Li-ion rechargable)
Produces 200 ppm or 500 ppm. 2 sizes.

Albert – United States
November 25, 2011 - 21:28
Subject: Colloidal mixed with ozonated water

Im curious, what effect would using ozonated distilled water have if any?

Reply to Albert
November 12, 2012 - 14:58
Subject: Re: Colloidal mixed with ozonated water

I use ozonated water so of course I am curious if it makes any difference

taiwo – Nigeria
January 05, 2011 - 05:40
Subject: Please be of help!!!

Hello Guys, Please I want to inquire about a device that can be used to detect the percentage, quantity, ounce or amount of silver that can be extracted from a water. I want the name of the device, where I can get it and the amount. thanks.

Carolk – UK
August 24, 2010 - 11:04
Subject: My home made solution strength.

I purchased a Colloidal silver maker last year, the sollution is 3 to 5 parts per million and particle size is between .45 and 1.2 microns. What is this good for please? Its quite hard to find a some kind of table on the web giving the different solutions ans their usages. Thanks.

Reply to Carolk
Vladimir – BG
January 29, 2011 - 03:48
Subject: Re: My home made solution strength.

You can use any kind of solution for anything you want and there will be a positive effect.However sometimes some pathogens are more resistant to the silver ions and the solution should be twice or three times stronger,and the applying time should be longer.It takes usually 5-10 min for the silver water to have a nice results.

lela – Oregon
January 31, 2010 - 01:56
Subject: making colloidal silver

I have tried to make colloidal silver at home and am confused as to how much distilled water to use and how long to leave the rods in the water. Do I or don't I add a couple drops of salt water? If I don't, nothing ever happens, yet I read that it is actually silver chloride if I use salt. I would really like some info on this. I have read many articles but none of them give me any specifics on how long to leave the rods in or what amount of water to use. And how strong is it if you do it in say a quart of water for 30 minutes? Can anyone help me?

Reply to lela
January 08, 2011 - 16:21
Subject: Re: making colloidal silver

Do not use salt, or anything else in the distilled water. It will eventually work on it's own, but if the water is heated first it will expand the molecular structure and make it work faster. I place the container of Distilled water in the microwave for three minutes (using extreme caution in handling) before sitting it on a small electric heating plate.
I normally make about a pint at a time and use 12 volts of DC. I have a led light wired in series with my power supply which indicates the conductivity by the brightness of it's glow. I leave it for two hours and it's makes a very good quality Colloidal silver, I then use a laser light to indicate the quality by the strength of the beam.

Louis Anderson – New Port Richey Fl
April 26, 2009 - 20:14
Subject: conduction in distilled water

I have a device that was intended to dispense copper and silver in a swimming pool. When used with two silver dollars it makes a high production silver generator. My question is I was taught that distilled water is an insulator and the tests I've made seem to confirm that. I had to add salt to generate a current flow. How do you generate a current flow thru the insulating distilled water?

Reply to Louis Anderson
Silver Serf
July 05, 2009 - 02:08
Subject: Re: conduction in distilled water

Pure distilled water has a very low conductivity, (in this sense an insulator) however as electrolysis progresses, silver ion and particles are released into the solution. Assuming your water and silver are both pure, any increase in conductivity of the solution can be regarded as concentration of siver colloid (ppm). Adding salt as a conductive agent will in fact speed electrolysis but will also rapidly increase the current which will knock off chunks of silver instead of ions and micron range colloids, and also create silver chloride (a grey film) which will ultimately give you a bad case of the blues! (Argyria) Use only pure silver and pure distilled water, it may take longer but will produce a superior quality CS.

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