Pedro et al. (2019) performed nutritional and qualitative analysis of goji berries grown using conventional and organic methods. The methodology used was similar to the procedures used in this project in the aspects of heating. In this regard, the temperatures used for ashing the samples are almost similar to the temperatures used in the Maltese project, with the main difference being duration. Determination of metallic contents in the Maltese project did not involve the use of HCLO4. Next, the samples were cooled to room temperatures accompanied by the addition of distilled water. Atomic absorption spectroscopy equipment was used for measurement of inorganic mineral elements while quantification of these mineral elements was carried out by utilising calibration curves constructed from the standard analysis of each element as recommend by Analyst 200 acquired from the USA. Thus, despite the use of different equipment and procedures, Pedro et al. (2019) also relied on spectrometry analysis, only that the Maltese project involved the use of MP-AES methodology while Pedro et al. (2019) also implemented atomic spectrometry. As a result, this process presents a similarity between the procedures used