This paper designed and synthesized a simple fluorescent probe L to detect Ba²⁺ based on pyridoxal and picolinylhydrazide, which was characterized by ¹H NMR, ¹³C NMR and HRMS. Probe L not only presented high selectivity for Ba²⁺ on various cations, but also had a lower detection limit (6.351×10^-6M) at EtOH/H₂O (1/1, v/v, pH=7.4) with a binding ratio of 2:1. Experimental results demonstrate that the proposed probe L can detect real water and food salt efficiently, and thenachieve recoveries ranged from 96% -100 % and 75%-101% respectively.

中文翻译：

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一种检测Ba ^2+的简单高效的荧光探针及其各种应用

本文设计并合成了一种简单的荧光探针L，用于检测基于吡ido醛和吡啶啉酰肼的Ba ²⁺，并通过¹ H NMR，¹³ C NMR和HRMS对其进行了表征。探针L不仅对各种阳离子上的Ba ²⁺具有较高的选择性，而且在EtOH / H ₂ O（1/1，v / v，pH = 7.4）下具有较低的检出限（6.351×10 ^-6 M）。绑定比例为2：1。实验结果表明，所提出的探针L能够有效地检测出真实的水和食盐，回收率分别为96％-100％和75％-101％。