Ion exchange equilibrium of neutral amino acids on 732 strong acid cation exchange resin in non buffer systems were studied and an equilibrium model was proposed.
研究了非缓冲体系中性氨基酸在732型强酸性阳离子交换树脂上的离子交换平衡，并提出了平衡模型。
Methods Pigments were absorbed from samples by activated kaolin in which the internal standard was theophyline. Urine 17-OHCS was absorbed by neutral styrene-divinylbenzene resin.
方法：标本用活性高岭土吸附尿内色素，以茶碱作内标，中性苯乙烯-二乙烯苯树脂微色谱柱吸附尿中1 7-OHCS。
Petroleum Hydrocarbon resin is neutral and inactive to pigment, as a binder resin, the main advantages are drying fast, alkali resistance and abrasion proofing.
石油树脂是中性的，不会和颜料反应，可用来当做粘着剂且具有快干、耐酸性、防刮伤、表面光泽等优点。
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