Our lab specializes in the identification and quantification of pesticides, microorganisms, allergens, terpenes, residual solvents, and synthetic chemicals.


Essential Oils, extracts, absolutes, CO2 extracts, and concretes for quantitative, qualitative, and chirality analyses for purity

Carrier Oils
Physical Constants

(optical rotation, specific gravity, refractive index, colorimeter)

Fragrance Analysis

Our lab is committed to ensuring that we use only the most sensitive and reliable tools and processes. We know each test has limitations.


Gas Chromatography with Mass Spectrometry (GC-MS) is a method of separating the volatile compounds in natural products into individual components and identifying each of these components and their percentages. This process is a common test used to identify natural product adulteration and is the workhorse of APRC.


Enantioselective or Chiral GC-MS is similar to standard GC-MS testing, except that with a chiral column it is possible to specifically identify small differences in nearly identical molecules know as enantiomers. Chiral GC-MS is only applicable to chiral molecules and can assist in ensuring the purity of natural products.


One of the most commonly used essential oil tests is standard Gas Chromatography with flame ionization detection (GC-FID). This detection method adds to the quantitative ability of GC testing. It is used by APRC to test for volatile compounds for quantitative analysis.


The combination of liquid chromatography with mass spectrometry (LC-MS) represents a powerful analytical tool for compound identification and quantification. It is used to test for non-volatile compounds and is useful for contaminants such as pesticides.


APRC has the latest in automated physical constant testing, including the following:

Optical Rotation Optical rotation tests for chirality by measuring the amount of light bend produced by the orientation of liquid molecules to determine whether the molecular structure complies with the determined standard.

Specific Gravity Measured using a densitometer, the specific gravity of liquid samples is the density of a particular sample in comparison with the density of water. Specific gravity readings are measured at precise temperatures and pressures, as temperature and pressure can impact the measurements. Particular liquids, such as essential oils, have known ranges of specific gravity in which the liquid is considered to be unadulterated and pure.

Refractive Index The refractive index of a liquid sample is a measurement that tests how the speed of light is altered when passing through the liquid. A liquid’s refractive index can be compared to that of a reliable sample.

Colorimeter This instrument is used to take the subjectivity out of color comparison and evaluation. A colorimeter is an instrument that compares the amount of light getting through a solution with the amount that can get through a sample of pure solvent. A colorimeter contains a photocell that is able to detect the amount of light that passes through the solution under investigation.