ppb
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网络 十亿分之一; 嵌段共聚聚丙烯; 十亿分率; 十亿分之一浓度; 痕量级
双语例句
- Determination of ppb level anions in sulfolane by ion chromatography with a novel column-switching injection system;
综述了离子色谱技术在气溶胶可溶性无机离子测定中的应用。 - The SEM of the impact part showed that the composite presented an obvious tough break.
SEM断口分析表明，加入SiO2及PE-g-MAH的PPB复合材料呈现明显的韧性断裂特征。 - DON amounts of various components were in the range of 2900~ 18670 ppb during milling process.
制粉过程各组分DON含量在2900～18670ppb之间。 - The ratio of polymorphic bands ( PPB) was 67.79%.
扩增片段中多态性带141条，平均多态性比率（PPB）为67.79%。 - Several nuclei disappearance. The aflatoxin B: was found 300 ppb in feed.
饲料中黄曲霉毒素B1含量为300ppb。 - The formation of PPB carbides is related to the amount of residual oxygen in alloy.
PPB碳化物的形成主要是和合金中残留氧量有关。 - The results showed that ozone and PAN in most area of east China were increased by biogenic NMHC, the average maximum increment of ozone and PAN were 9? ppb and 0 6? ppb respectively.
研究结果表明，生态NMHC使我国东部大部分地区臭氧和PAN增加，最大平均增量分别为9ppb和06ppb； - The linear range is 3 orders of magnitude and the detection limits is 10 ppb.
标准曲线的线性范围达3个数量级，检测下限为10ppb，方法的平均回收率为98.7%，变异系数为2.99%。 - The ( analysis) of IR showed that the hydroxyl group of SiO_2 surface decreased, and the polarity was weakened, so the compatibility of PPB matrix was enhanced.
红外分析表明，表面处理后的SiO2表面羟基减少，极性明显减弱，增加了与PP基体的相容性； - The mean U content in mineral water is 9.20 ± 0.16 ppb, which is 10 times higher than that in other beverages.
矿泉水中铀含量平均值为9.20±0.16ppb，为饮料中平均铀含量的10倍。 - Objective To summarize the CT features of pleuropulmonary blastoma in children in order to improve the early diagnostic rate.
目的总结小儿胸膜肺胚细胞瘤（pleuropulmonaryblastoma，PPB）的CT表现特点，以提高早期诊断率。 - The metal ions of ppb level in water samples can be measured by atomic absorption spetroscopy.
用原子吸收分光光度法测定水样中金属离子下限可达ppb级。 - A new method of ion chromatography to determine polyphosphates simultaneously in ppb(μ g/ 1) level was established.
建立了同时测定ppb级（μg/1）多聚磷酸盐的离子色谱新方法。 - By scrubbing with dilute polysulfide solution, the residual mercury in the gas can be removed from about 0.1 to below 0.01 ppb, a reduction of 900%.
用稀多硫化物溶液去洗涤气体中残留的汞，能从0.1ppb脱除到低于0.01ppb，减少90%。 - A detection limit of 0.1 ppb was obtained from the substrates with 60-nm sized Au NPs, which is to our knowledge the lowest detection limit reported for DPA using this type of SERS substrate.
60nmAuNPs制备的基底得到的检测下限为0.1ppb，据我们所知，这已经是用此类型SERS基底来检测DPA的报道中最低限了。 - After optimization, qualitative detection of p-aminophenol, p-nitroaniline, aniline and benzidine were achieved with the limit of detection in ppb level.
通过对银溶胶浓度和凝聚剂浓度等实验条件的优化，实现了对苯胺、联苯胺、对氨基苯酚和对硝基苯胺的定性分析，检测限达ppb级。