The present research assesses the chemical fractionation of cadmium (Cd), chromium (Cr), and lead (Pb) detected in saline soil samples of Hyderabad Pakistan. Based on the reagents used in the BCR three-step conventional sequential extraction (CSE) for partitioning Cd, Cr, and Pb in saline soil samples, a Microwave induced single-step extraction (MSE) method was developed. The validity of the method was confirmed using certified reference material (CRM) BCR-483 and the standard method of addition (recoveries 96–102%). The data provided by the BCR- CSE method for Cd, Cr and Pb partition were compatible with MSE using the same operating conditions applied and checked in BCR fraction by the Certified Reference Material (CRM) BCR-483. Using compromised sonication and microwave conditions steps 1–3 of the sequential extraction (excluding hydrogen peroxide digestion in step 3) could be accomplished with ultrasonic bath between 15 and 30 min, whereas 60–120 s needed for MSE. The total concentrations of Cd, Cr, and Pb extractable metals produced by three separate extractions ranged 1.02–3.30, 5.02–9.95 and 3.97–8.01 μgg⁻¹, respectively. The accuracy of the proposed BCR single extraction methods (expressed as RSD %) for all metals was found within the range of (4.99–8.61%).

本研究评估了巴基斯坦海得拉巴盐渍土壤样品中检测到的镉（Cd），铬（Cr）和铅（Pb）的化学分馏。基于BCR三步常规连续萃取（CSE）中用于在盐渍土壤样品中分配Cd，Cr和Pb的试剂，开发了微波诱导单步萃取（MSE）方法。使用认证的参考物质（CRM）BCR-483和标准添加方法（回收率96–102％）确认了该方法的有效性。BCR-CSE方法提供的Cd，Cr和Pb分配数据与MSE兼容，使用的标准操作条件与BCR分数由认证参考材料（CRM）BCR-483进行了核对。使用受损的超声处理和微波条件，顺序萃取的第1至第3步（不包括第3步中的过氧化氢消化）可以在15至30分钟之间进行超声浴，而MSE则需要60-120 s。通过三个单独的萃取产生的Cd，Cr和Pb可萃取金属的总浓度范围为1.02–3.30、5.02–9.95和3.97–8.01μgg^-1。建议的BCR单一萃取方法对所有金属的准确度（以RSD％表示）在（4.99–8.61％）范围内。