Editing Final Report/Thesis 2018 (section)

===Preparation===
====Hair Elements====
Before the ICP-MS could be used for the analysis on the hair samples, different isotopes had to be chosen for the ICP-MS to find. Research was completed to find the most common chemical elements inside human hair, which included carbon, hydrogen, oxygen, sulphur, phosphorus and zinc. Then further research to indicate what element we want the ICP-MS to find, which included any toxic elements and common elements in food. There were 24 isotopes that were recorded by the ICP-MS and are shown in Table 2.
[[File:ZFigure16.jpg|thumb|500px|center|Table 2. Isotopes chosen for the ICP-MS]]

====Hair Samples====
In this project, a different hair samples was obtained, from five different individuals, for more reliable and accurate results. Two of these samples obtained, were from people that left Adelaide for a period of time and the other three samples were from people that stayed in Adelaide. All the samples will be anonymous for privacy reasons and will be identified as A, B, C, D and E. A summary of each hair sample is shown in Table 3, this includes which sample is identified as, sex, the date the hair was obtained and a brief description of the sample.
[[File:ZFigure17.jpg|thumb|500px|center|Table 3. Summary of the samples]]
The length of time out of Adelaide is very important, as we can determine the length of hair that was in Adelaide and the length of the hair that was outside of Adelaide. Sample A left Adelaide for 7 days, assuming there is 30 days in one month and hair grows 1cm per month, therefore 2.33mm of hair is from Japan. Similarly with sample E, they left Adelaide for 13 days, therefore 4.33mm of hair is from Bali. Also have to take consideration of the 2 days from when they came back to Adelaide to when the hair was obtained, this is 0.67mm. An example of the length of the hairs is shown in Figure 15.
[[File:ZFigure18.jpg|thumb|500px|center|Figure 15. Example of the hair length]]
The red displays the 2 days before obtaining the hair, when both samples came back to Adelaide. The orange shows the length of sample A and the green shows the length of sample E, when both samples were away from Adelaide.

====Quartz Slide====
The hair samples will be placed on a slide, in this case the slide will be made of pure quartz. The reason a pure quartz slide is used, rather than an ordinary glass slide is that, glass slides have a lot of impurities that would contaminate the result, where as a pure quartz slide does not. The elements in a glass slide and quartz slide is shown in Table 4.
[[File:ZFigure19.jpg|thumb|500px|center|Table 4. Comparison of elements in glass and quartz slide]]
The hair samples were stuck down with double sided sticky tape on the quartz slide, this will have some contamination and will have to be dealt with appropriately.