Compare to the general and other ways to process omega-3 fatty acids, Huatai adopt an extra purification step to process our crude oil. Through this step, mostly free fatty acid, heavy metals, gelatin, color compounds and other impurities can be removed, the crude oil become much more pure. We know many impurities compound, such as heavy metals can accelerate the oxidation of unsaturated fatty acids in processes and storage. Preliminary purification of crude oil guarantees the high quality of our finished products. 

Dioxin is the common name used to refer to the chemical 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin or TCDD. In addition to dioxin itself there are other compounds, such as the polychlorinated dibenzodioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and some polychlorinated biphenyls (PCBs) that have similar structures and activity as dioxin. These are often commonly referred to as dioxin-like compounds or "dioxins".
The dioxins and PCBs are known as the carcinogenesis compounds which damage human health seriously, it must be removed to a safety limit level. For omega-3 concentrated fish oil, GOED, EU and US Pharmacopoeia set limits on these compounds. HUATIA pay high attention on the science and technologies development for removal of these organic pollutants, we adopt the proprietary process before esterification to removal of Dioxins. Furans and PCBs from the products, this guarantee the lowest limits of environmental pollutants as following:

The oxidation and thermal decomposition or trans-isomerization of unsaturated fatty acids can forms various peroxides compounds and trans-fatty acid (TFAs), which are proved to be hurtful on human health, it must be put into  strictly control in industry process. In the quality limits set by GOED, EU and US Pharmacopoeia, the oxidation represented mainly by Peroxide Values, Anisidine Values, Totox etc.
 
Omega-3 Fish oil mainly consisted of high degree poly-unsaturated fatty acids, which are very instable against heat and oxygen. It can easy be oxidized with oxygen exposure in air and with long time heating and high temperature, it’s in high risk of thermal decomposition or trans- isomerization. So, mild process and extra care are absolutely necessary in production of concentrated omega-3 fatty acids.
In our production, we take the advantages of our state-of-the-art facilities and pay extra care in process to protect oil from exposure, improper heating with high temperature, for example, we improved the short-path distillation plant to conduct in highest vacuum condition to get the lowest evaporation temperature, the oil flows from step to step absolutely in airtight pipe or in vacuum condition., some process steps are protected by nitrogen. Our mild process and extra expertise care in our production guarantee the lowest oxidation limits as following

With equipment of state-of-the-art short-path distillation (SPD), HUATAI process it’s fish oil by multi-stages short-path distillation which provide a gentle way to protect fish oil from oxidation, thermal decomposition or trans-isomerization of the unsaturated fatty acids.
 
In general, fish oil processed by short-path distillation guarantee much better quality than that by traditional distillation technology, the strong advantages can be summarized as following,
Low level of trans fatty acids
low level of oxidation
Odourless & Colorless
High purity

The unique fishy smell and color of fish oil mainly depend on the species and quality of the crude fish oil. Through our unique physical removal process and specialized equipment, we can make the fishy smell of fish oil very mild or no fishy smell, and the color clear.