Ajala M O, Asaolu S O
Department of Zoology, Obafemi, Awolowo University, Ile-Ife, Nigeria.
J Helminthol. 1995 Mar;69(1):1-5. doi: 10.1017/s0022149x00013754.
The efficacy of the salt flotation technique using saturated solutions of sodium nitrate (specific gravity 1.30) and zinc sulphate (specific gravity 1.16) for separating Ascaris lumbricoides eggs from clay, loamy and sandy soils has been investigated. Ten samples of each of the egg concentrations of 100, 500, 2500, 5000 and 10,000 eggs/25 g of soil were used for each soil type. Using T-test and ANOVA, the number of eggs recovered from sand was significantly higher than from loam and the number from loam significantly higher than from clay. With sodium nitrate, the maximum egg recovery rate was 25.04% from sandy soil at a concentration of 500 eggs/25 g soil while with zinc sulphate it was 13.88% also from sandy soil and concentration of 500 eggs/25 g soil. While the number of eggs recovered increased with soil egg concentration, the percentage of eggs recovered is inversely proportional to egg concentration. The number of eggs recovered with sodium nitrate was significantly higher than with zinc sulphate solution in the three soil types.
研究了使用硝酸钠饱和溶液（比重1.30）和硫酸锌饱和溶液（比重1.16）的盐浮选技术从粘土、壤土和砂土中分离蛔虫卵的效果。每种土壤类型均使用了100、500、2500、5000和10,000个卵/25克土壤这五种卵浓度的十个样本。使用T检验和方差分析，从砂土中回收的卵数显著高于壤土，从壤土中回收的卵数显著高于粘土。使用硝酸钠时，在浓度为500个卵/25克土壤的砂土中，最大卵回收率为25.04%；而使用硫酸锌时，同样在浓度为500个卵/25克土壤的砂土中，最大卵回收率为13.88%。虽然回收的卵数随土壤卵浓度增加而增加，但回收的卵百分比与卵浓度成反比。在三种土壤类型中，使用硝酸钠回收的卵数显著高于使用硫酸锌溶液回收的卵数。
