Palladium is a highly valuable metal in automobile, chemical, and pharmaceutical industries. The metal is generally quantified by atomic absorption spectrometry or inductively coupled plasma mass spectrometry. These techniques are tedious and require expensive instruments that are operated mostly off site. As cost-effective and user-friendly alternatives to these techniques, we previously reported two practical fluorometric or colorimetric methods to quantify palladium. Both methods rely on the use of NaBH₄, which cannot be stored in solution for more than 10 days. Commercially available solutions of NaBH₄ are partially or fully degraded to di- or triborohydride species and cannot be used for palladium(0)-catalyzed allylic C–O bond cleavage for quantification purposes. Here, we report a new method that replaces NaBH₄ with NH₂NH₂ for the palladium-catalyzed deallylation of fluorogenic and colorimetric chemodosimeter resorufin allyl ether. This method is slower but as sensitive as the most recent method from our laboratory. The method is selective for palladium and depends on the presence of tri(2-furyl)phosphine as a palladium ligand and NH₂NH₂ as a palladium-reducing reagent.

中文翻译：

---

非泡腾法用于彩色或荧光催化催化钯检测

钯是汽车，化学和制药行业中非常有价值的金属。通常通过原子吸收光谱法或电感耦合等离子体质谱法对金属进行定量。这些技术是乏味的并且需要昂贵的仪器，这些仪器大多在现场操作。作为这些技术的经济高效且用户友好的替代方法，我们先前曾报道过两种实用的荧光法或比色法来量化钯。两种方法都依赖于NaBH ₄的使用，而NaBH ₄不能在溶液中保存超过10天。NaBH _4的市售解决方案被部分或全部降解为二硼氢化物或三硼氢化物，并且不能用于定量分析的钯（0）催化的烯丙基CO键断裂。在这里，我们报告了一种新方法，用NH ₂ NH ₂代替NaBH ₄进行钯催化的发荧光和比色的化学计量比试卤灵烯丙基醚的脱铝反应。这种方法较我们实验室最新的方法慢，但同样灵敏。该方法对钯是选择性的，并且取决于三（2-呋喃基）膦作为钯配体和NH ₂ NH ₂作为钯还原剂的存在。