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首页> 外文期刊>Australian Journal of Crop Science >Recovery of metallic markers sprayed on soybean plants
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Recovery of metallic markers sprayed on soybean plants

机译：回收喷洒在大豆植物上的金属标记

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To understand aspects related to the application of plant protection products, the analysis of spray deposits using metallic markers is a simple and low cost alternative. However, choose the appropriate marker is a challenge. Here, we investigated the recovery of metallic ions used as markers sprayed on soybean plants. The experiment was carried out with soybean plants grown in vases from April to June 2012. The experimental design was completely randomized with 5 treatments, each one composed by the metallic markers: manganese sulfate (MnSO4), zinc sulfate (ZnSO4), copper sulfate (CuSO4), copper hydroxide (Cu(OH)2) and copper oxychloryde (CuCl2.3Cu(OH)2). Each marker was sprayed on soybean leaves in 5 dosages and 2 replications (plants at phenological stages R1 and R2). Furthermore, the metallic markers were applied over the glass laminae due to their inability to absorb. Later on, the markers were washed from soybean leaves and the glass laminae. In this process, samples were submitted to the acid solution (0.2 mol L-1HCl) for 60 minutes and the quantification of the recovered concentration of each ion was accomplished by means of an atomic absorption spectrophotometer. Hence, standard curves of the cations Cu2+, Mn2+, and Zn2+ with concentrations of 0.25, 0.5, 1.0, 2.0 were used. The values were submitted to the statistical analysis of regression. Considering the extraction method used and the rate of recovery, the markers copper hydroxide and copper oxychloride are not recommended for such studies, since these products either on soybean leaves or in a glass laminae showed lower recovery (lower than 97%). Otherwise, the manganese, copper and zinc sulfates (above than 98%) are suitable for studying spray deposits. Appropriated metallic markers to study deposits are discussed.
机译：为了了解与植物保护产品应用有关的方面，使用金属标记物分析喷雾沉积物是一种简单且低成本的选择。但是，选择合适的标记是一个挑战。在这里，我们调查了用作喷在大豆植物上的标记物的金属离子的回收率。该实验是使用2012年4月至2012年6月在花瓶中种植的大豆植物进行的。实验设计完全随机进行了5种处理，每种处理均由金属标记物组成：硫酸锰（MnSO4），硫酸锌（ZnSO4），硫酸铜（ CuSO4），氢氧化铜（Cu（OH）2）和氯氧化铜（CuCl2.3Cu（OH）2）。将每种标记物以5种剂量和2次重复（植物处于物候阶段R1和R2）喷在大豆叶片上。此外，由于金属标记物不能吸收，因此将其施加到玻璃薄片上。之后，将标记物从大豆叶片和玻璃薄片上洗净。在此过程中，将样品置于酸性溶液（0.2 mol L-1HCl）中放置60分钟，然后通过原子吸收分光光度计对每个离子的回收浓度进行定量。因此，使用浓度分别为0.25、0.5、1.0、2.0的阳离子Cu2 +，Mn2 +和Zn2 +的标准曲线。将该值提交给回归的统计分析。考虑到所用的提取方法和回收率，不建议在此类研究中使用氢氧化铜和氯氧化铜作为标记，因为这些产品在大豆叶片或玻璃薄层中的回收率均较低（低于97％）。否则，锰，铜和锌的硫酸盐（超过98％）适合研究喷雾沉积物。讨论了用于研究矿床的合适金属标记物。

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