sample  purity  Hydrocarbon  
1       86.91   1.02 
2       89.85   1.11 
3       90.28   1.43 
4       86.34   1.11 
5       92.58   1.31 
6       87.33   0.95 
7       86.29   1.11 
8       91.86   1.27 
9       95.61   1.43 
10      89.86   1.02 
11      96.73   1.46  
12      99.42   1.55  
13      98.66   1.55 
14      96.07   1.55  
15      93.65   1.40 
16      87.31   1.15  
17      88.20   1.01
18      86.85   0.99
19      85.20   0.95
20      90.56   1.28