A dynamic gas extraction-assisted paper-based method for colorimetric determination of bromides,Analytical Methods

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A dynamic gas extraction-assisted paper-based method for colorimetric determination of bromides
Analytical Methods ( IF 2.7 ) Pub Date : 2020/01/08 , DOI: 10.1039/c9ay02640a
Marina O. Gorbunova _{1,

2,

3,

4,

5} , Maria S. Garshina _{1,

2,

3,

4} , Margarita S. Kulyaginova _{4,

5,

6,

7} , Vladimir V. Apyari _{2,

4,

8,

9} , Aleksei A. Furletov _{2,

4,

8,

9} , Alexey V. Garshev _{2,

4,

8,

9,

10} , Stanislava G. Dmitrienko _{2,

4,

8,

9} , Yury A. Zolotov _{2,

4,

8,

9,

11}

Affiliation

A new method for selective determination of bromides in natural waters, foodstuffs and pharmaceuticals has been developed. It is based on oxidation of bromides with dichromate, dynamic gas extraction of molecular bromine with an air flow and sensing by paper modified with silver triangular nanoplates (AgTNPs) as a colorimetric reagent. Interaction of AgTNPs with bromine resulted in the discoloration of the AgTNP-modified paper, which was monitored using a scanner. The high selectivity of the dynamic gas extraction for volatile bromine enabled the direct determination of bromides in mineral water, river and sea water, alga, shrimps, fish, bread and pharmaceuticals with minimal sample pretreatment. The limit of detection of bromide was found to be 0.02 mg L⁻¹. The determination range was 0.05–1.5 mg L⁻¹.

中文翻译：

一种基于动态气体萃取纸的比色法测定溴化物的方法

已经开发出一种选择性测定天然水，食品和药品中溴化物的新方法。它基于溴化物的重铬酸盐氧化，气流的动态气体萃取以及通过用银三角纳米板（AgTNP）修饰的纸作为比色试剂进行感测的分子溴。AgTNP与溴的相互作用导致AgTNP改性纸变色，可使用扫描仪对其进行监测。动态气体萃取对挥发性溴的高选择性使得能够以最少的样品预处理直接测定矿泉水，河水和海水，藻类，虾，鱼，面包和药品中的溴化物。发现溴化物的检出限为0.02 mg L ^-1。测定范围为0.05–1.5 mg L^-1。

更新日期：2020-02-13

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