Table 7 Kruskal Wallis test to compare the relative spectral intensity of trace elements between commercially packaged forms of tobacco.

From: Qualitative evaluation of trace elements in commercially packaged forms of tobacco using laser-induced breakdown spectroscopy

Elements

Intensity

Median

Interquartile range

P value

Al

\(\:4626.88\pm\:\:2107.57\)

2552.62

4351.17

< 0.001

Ni

2877.39\(\:\pm\:\) 1154.99

1768.37

2237.31

< 0.001

Cr

\(\:1498.40\pm\:\:449.10\)

905.83

1931.84

< 0.001

Fe

\(\:1002.59\pm\:\:245.02\)

923.26

717.54

< 0.001

Ca

\(\:38014.38\pm\:\:7894.27\)

39818.45

36306.05

< 0.001

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