聚乙二醇中的磷污染。
Phosphorus contamination in polyethylene glycol.
机构信息
Department of Forest and Wood Sciences, Colorado State University, Fort Collins, Colorado 80523.
出版信息
Plant Physiol. 1978 Apr;61(4):708-9. doi: 10.1104/pp.61.4.708.
Concentrations of Fe, Mn, Cu, Zn, Ca, Mg, K, and P were examined in untreated and ion exchange resin-treated solutions of polyethylene glycol, molecular weight 3000 to 3700, polyethylene glycol (PEG 4000). Relatively high levels of P were found in untreated PEF-4000 solutions. The concentration of contaminating P in solutions prepared from untreated PEG 4000, even at high water potentials (-1 to -3 bars), was greater than what is usually found in soil solution. Occurrence of significant amounts of P in untreated PEG could introduce problems in experiments where (32)P and PEG are used together and where phosphate interactions may occur.
对未经处理和经离子交换树脂处理的分子量为 3000 至 3700 的聚乙二醇（PEG 4000）的溶液中的 Fe、Mn、Cu、Zn、Ca、Mg、K 和 P 浓度进行了检查。在未经处理的 PEF-4000 溶液中发现了相对较高水平的 P。即使在高水势（-1 至-3 巴）下，由未经处理的 PEG 4000 制备的溶液中，污染 P 的浓度也大于通常在土壤溶液中发现的浓度。未经处理的 PEG 中大量 P 的存在可能会在同时使用（32）P 和 PEG 的实验中以及可能发生磷酸盐相互作用的实验中引入问题。
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