Bioaccumulation of Heavy Metals in Water, Sediments, and Tissues and Their Histopathological Effects on Anodonta cygnea (Linea, 1876) in Kabul River, Khyber Pakhtunkhwa, Pakistan

Table 2

The standards used to analyze the variable using atomic absorption spectrophotometer (Spectra-AA-700).

Metals	Wavelength (nm)	Flame	Working range (µg/mL)
Cd	228.8	AA (R)	0.5–2
Cr	357.9	AA (R)	2–8
Cu	324.8	AA (L)	2–8
Fe	279.5	AA (L)	1–4
Ni	324.7	AA (L)	3–12
Pb	283.3	AA (L)	5–20
Mn	248.3	AA (L)	1–4
Zn	213.9	AA (L)	0.4–1

AA, air acetylene; R, fuel-rich; L, fuel-lean.