Hans Laroo Research Areas

Laboratory Reports and Clinical Trials

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Colloidal Silver (CS)
as an Antiseptic

So often there is a singular lack of pharmacognosy – literally knowing your drug – when procuring, or even preparing, an antiseptic ‘colloidal silver’ (CS) preparation.

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Silver’s Connection with the Environment

Silver’s unique properties as a metal and a substance are extremely diverse and in particular allowing electrical current and thermal heat to flow much higher compared to other conducting metals such as copper.

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Laboratory Reports and Test Results

Comments: For the benefit of this website, laboratory reports and test results must only relate to the samples produced by the author and to others, responsible for such reports and results. They are listed as hereunder as either specific reports or test results or alternatively a reference to a paper published. The author Hans Laroo is not involved in any clinical trials, only providing samples to do so.

Lab repot/result: AMSD Laboratories, Silverwater, NSW, September 12, 2009

Test organisms: 1. Enterococcus faecalis ATCC 19433
2. Candida albicans ATCC 10231

Test Concentration: Neat
Contact Time: 60 minutes
Neutraliser: T6 (1:10) for E.faecalis and T6 with sodium thiosulphate (1:100) for C. albicans Test Temperature: Ambient
Results: Table 1. Surviving organisms after exposure to Ag Water Solution.
Enterococcus faecalis
Candida albicans
Contact time CFU/ml
Log Reduction CFU.ml
Log Reduction 60 minutes <10 (Log 1.0) < 5.2 < 100 (2.0 Log) < 3.57
Inoculum Level 1.5 x 106 (6.2 Log) 3.57 x 105 (5.57 Log)
CFU = Colony Forming Unit

The sample “Ag Water Solution” has successfully demonstrated antimicrobioal activity against Enterococcus Faecalis and Candida albicans by achieving greater than 5.2 log reduction (or more than 99.999% kill) and 3.57 log reduction (or more than 99.9% kill) respectively, when tested in the conditions described above.

Was signed by Sterile Product Testing Manager

Extract Malvern Report dated December 15, 2014 (Malvern Zetasizer Ver.7.02)

Size Results Export Report: Sample name 161 12014 QR, Record number 8

Size d.nm       Volume %
3.615       0.4
4.187       8.7
4.849       16.2
5.615       7.9
6.503       5.6
7,531       22.1
8.721       27.5
10.10       11.0

This sample was produced with a current of 500 micro ampere/h @ a voltage potential of 300 volts DC over a period of 48 hours in refrigerated conditions.
The volume of the water was 4 litres and a 167 violet LED array (250mm diameter disc format) was used for the reduction.

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Contact Details

I am an independent science researcher in the realm of Quantum physics in “nanometer sixed atomic silver clusters in an aqueous electrical suspension”, more popularly known as, ”Nano Colloidal Silver”.

Ipswich Australia 4305, Australia
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