Technical sodium lignosulfonate, a natural polymer, was used as reducing and stabilizing agent for a simple and inexpensive synthesis of silver and gold nanoparticles (AgNPs and AuNPs) in aqueous solution at room temperature. Further, AgNPs and AuNPs were used for spectrophotometric detection of selected heavy metals ions (Cd²⁺, Cu²⁺, Co²⁺, Pb²⁺ and Ni²⁺) in model aqueous solutions. The obtained AgNPs and AuNPs were characterized by UV–vis spectrophotometry, size distribution (DLS) and transmission electron microscopy (TEM). The results clearly indicate that received silver and gold colloids can be used as chemical probes of the presence of heavy metal ions if the interference of other species is excluded.

工业用木质素磺酸钠（一种天然聚合物）被用作还原剂和稳定剂，用于在室温下简单且廉价地在水溶液中合成银和金纳米颗粒（AgNP和AuNP）。此外，AgNPs和AuNPs用于分光光度法检测模型水溶液中的选定重金属离子（Cd 2 ⁺，Cu 2 ⁺，Co 2 ⁺，Pb ²⁺和Ni ²⁺）。通过紫外可见分光光度法，尺寸分布（DLS）和透射电子显微镜（TEM）对获得的AgNPs和AuNPs进行了表征。结果清楚地表明，如果排除了其他物种的干扰，可以将收到的银和金胶体用作存在重金属离子的化学探针。