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首页> 外文期刊>Plant and Soil >In situ sampling of small volumes of soil solution using modified micro-suction cups.
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In situ sampling of small volumes of soil solution using modified micro-suction cups.

机译：使用改良的微吸盘对少量土壤溶液进行原位采样。

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摘要

Two modified designs of micro-pore-water samplers were tested for their capacity to collect unbiased soil solution samples containing zinc and citrate. The samplers had either ceramic or polyethersulfone (PES) suction cups. Laboratory tests of the micro-samplers were conducted using (a) standard solutions with zinc and citrate concentrations that can be found in the rhizosphere and (b) two soils with contrasting texture. The results showed that both suction cups were inert with respect to citrate and zinc: they did not affect the concentrations of the two ions in freshly prepared and directly sampled standard solutions. Both micro-suction cups removed most microorganisms by filtration, though the PES cups were more effective in this respect. This filtering by the suction cups allowed for relatively accurate analysis of citrate in solutions containing microorganisms. These capacities, together with their small size and small dead volume, make the two micro-pore-water samplers highly suitable for sampling of rhizosphere soil solutions although further testing with other organic acids and trace metals may be needed..
机译：测试了两种微孔水采样器的改进设计，它们具有收集含锌和柠檬酸的无偏土壤溶液样品的能力。采样器具有陶瓷或聚醚砜（PES）吸盘。微型采样器的实验室测试是使用（a）根际中存在的锌和柠檬酸盐浓度的标准溶液和（b）质地相反的两种土壤进行的。结果表明，两个吸盘对柠檬酸根和锌都是惰性的：它们不影响新鲜制备的直接采样的标准溶液中两种离子的浓度。尽管PES杯在这方面更有效，但两个微吸杯都通过过滤去除了大多数微生物。通过吸盘进行的过滤可以对含微生物溶液中的柠檬酸盐进行相对准确的分析。这些容量以及它们的体积小和死体积小，使得这两个微孔水采样器非常适合于根际土壤溶液的采样，尽管可能需要使用其他有机酸和痕量金属进行进一步测试。

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