Determination of Lead, Cations, and Anions Concentration in Indoor and Outdoor Air at the Primary Schools in Kuala Lumpur

Table 3

Concentration of Mg²⁺, Ca²⁺, and K⁺ for both indoor and outdoor air according to sampling stations.

Sampling; station	Mg^2+ (mg/g)		Ca^2+ (mg/g)		K^+ (mg/g)
	Indoor	Outdoor	Indoor	Outdoor	Indoor	Outdoor
A	3.87 ± 0.05	4.41 ± 1.07	47.65 ± 2.12	65.13 ± 9.42	60.56 ± 3.71	61.69 ± 5.24
B	3.06 ± 0.18	3.28 ± 1.54	48.33 ± 1.97	61.49 ± 9.67	38.07 ± 1.03	37.64 ± 5.33
C	2.59 ± 0.99	3.23 ± 1.89	38.85 ± 0.72	56.03 ± 9.72	52.80 ± 1.41	66.33 ± 7.54
D	2.64 ± 0.87	3.03 ± 0.74	36.92 ± 1.56	52.34 ± 7.16	45.09 ± 1.09	64.25 ± 4.92
E	1.83 ± 0.39	2.81 ± 1.93	40.8 ± 0.53	60.56 ± 4.93	48.74 ± 1.34	50.16 ± 4.36
F	1.88 ± 0.11	2.63 ± 0.12	30.30 ± 2.09	39.51 ± 5.01	58.23 ± 0.97	49.28 ± 5.05