IntroductionLanthanum (La) is a member of the rare earth elements (REEs), which consist of a group of 15 trivalent metallic elements with similar properties. Lanthanum is especially dangerous in the working environment, as moisture and gases can be inhaled with the air. This can cause pulmonary embolism, especially during long-term exposure. Lanthanum can also cause cancer in humans, as it increases the chances of lung cancer when inhaled. Finally, it can pose a threat to the liver when it accumulates in the human body. Lanthanum is discharged into the environment in many different places, mainly from oil-producing industries. It can also be released into the environment when household equipment is disposed of. Lanthanum will gradually accumulate in soils and aquifers and this will eventually lead to increasing concentrations in humans, animals and soil particles. In aquatic animals, lanthanum causes damage to cell membranes, which has several negative effects on reproduction and nervous system functions. It accumulates strongly in mussels. Lanthanum oxide and other rare earth oxides are used in the production of optical glasses, in the preparation of glass fibers for optical purposes, in gasoline cracking catalysts, in polishing compounds, in carbon arcs, and in iron and 'steel. industries to remove sulphur, carbon and other electronegative elements from iron and steel (Ganjali et al. 2006). Lanthanum ions accelerate the hydrolysis of the phosphate ester bond by 13 orders of magnitude. This suggests that the phosphate diester in DNA may also undergo such destruction. Therefore, lanthanum should be placed in the class of highly toxic metal ions that are potentially effective against microorganisms and higher organisms. Lanthanum chloride manifests itself as an anticancer. Genotoxicity of lanthanum(III) in human peripheral blood lymphocytes has also been reported. Lanthanum chloride caused changes in lipid peroxidation, redox system, and ATPase activities in root plasma membranes of rice seedlings (Haiduc and Silvestru 1990; Yongxing, Xiaorong, and Zichun 2000). Detection has become necessary lately, due to the increasing use of lanthanum compounds in industry. Several analytical methods have been reported for monitoring low levels of La(III) ions in various sample matrices. These methods include X-ray fluorescence spectrometry (Wu et al. 2010), high-sensitivity sensor based on carbon nanotube electrodes (Ghoreishi et al. 2013), ultrasound-assisted emulsification-microextraction (USAEME) followed by inductively coupled plasma optical emission spectrometry (ICP-OES), (Sereshti, Far, and Samadi 2012) inductively coupled plasma atomic emission spectrometry (Agrawal and Shrivastav 1997; Liang, Liu, and Guo 2005), combination of high electrochemistry temperature and time-of-flight secondary ion mass spectrometry (Rohnke et al.