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Table 4 Correlation matrix showing the relationship between the trace metal and core sediment properties (number: 21, threshold value of relation coefficient at a 95% confidence level: 0.503)

From: Heavy metal accumulation during the last 30 years in the Karnaphuli River estuary, Chittagong, Bangladesh

  Mz TOC Al Cr Cu Ni Pb Zn
Mz 1.000        
TOC −0.701 1.000       
Al −0.552 0.313 1.000      
Cr −0.742 0.637 0.617 1.000     
Cu −0.709 0.667 0.661 0.957 1.000    
Ni −0.769 0.647 0.585 0.983 0.947 1.000   
Pb −0.542 0.531 0.451 0.854 0.835 0.832 1.000  
Zn −0.756 0.663 0.714 0.953 0.978 0.951 0.806 1.000