Dr. Kevin Brigden and Scott Ballard
A number of different components can have the same retention time. Similarly, the mass spectra of many components of essential oils are very similar. Using the multiple comparison approach outlined above helps to avoid misidentification that can occur when only one type of library is used.
There are numerous examples of erroneous information within published oil composition data where only one type of library was used.
The percent composition figures quoted for each component of an oil are obtained from the mass spectrum detector. There are a number of different types of detector that are commonly used, and they all have slightly difference response factors to a particular component. The percentage figures quoted for each component may vary slightly from those obtained using, for example, a flame-ionisation detector (FID).
Mass spectrum detectors are far more accurate than an FID for component identification, which is why Kobashi use this type of detector for our primary analysis. We are currently analyzing all our oils using a FID detector, in addition to the GCMS data we already have. In this way, we will be able to compare the composition of our oils with reported data from either type of detector to a very high degree of accuracy.
Kobashi testing "This means that you do not need to buy organic oils" The reality is much more complex than this statement. We try to buy as much organically certified as possible. This does not mean they are free of herbicides or pesticides, but if we find them the oils will be rejected and the suppliers will be notified. I will say you are misleading yourself if you think a stamp on a product is 100% Organic just because it says organic. Most Organic Organizations do not test the end product for pesticide or herbicide residual, in fact, I do not know any that do. It is just a paper trail based on trust.
There are many reason for herbicide and pesticide residual. They have even been found in the ice at the poles. We are not able to assure that these nasty chemicals are not in products at trace parts per trillion for every known chemical. Not all herbicides are nasty. In fact, I would prefer to use a little Glyphosate than 100's of gallons of Diesel fuel that Organic farming on a commercial scale needs. Diesel has around 40 toxins and we breathe that crap every day of our lives. The probability that many cancers are caused by the toxins in Gasoline and Diesel is very high. Think of it you have been breathing that all your life. It is the dose that matters and even water is toxic if you get to much into the system. We do our best by testing to find what we can. I do not believe anyone can guarantee they are not present 100% and it would be misleading to say so.
best regards, Scott