答:HPLC(高效液相色谱)和GC(气相色谱)都是用来分析样品的组成和浓度的,它们都遵循同样的原理(色谱理论;定性定量原理;均可应用计算机控制色谱操作条件和色谱数据的处理程序):较重的分子会在洗脱、流动过程中慢于较轻的分子(极性也起着重要的作用)。同时,它们也存在着一些不同: A) 流动相的不同。GC:流动相为惰性...
GC is particularly effective for volatile and thermally stable compounds. The choice between GC and HPLC depends on the physical and chemical properties of the sample to be analyzed. 13 HPLC offers the advantage of analyzing a broader variety of samples because it does not require the sample to...
Performance Level 2: High throughput applications; choose these when robustness and reproducibility are key Performance Level 3: High performance; choose these when sensitivity is a must No HPLC/UHPLC or GC instrument has been left behind. Our vials and well plates are suitable ...
Performance Level 2: High throughput applications; choose these when robustness and reproducibility are key Performance Level 3: High performance; choose these when sensitivity is a must No HPLC/UHPLC or GC instrument has been left behind. Our vials and well p...
The recoveries of 523 pesticides and metabolites at 2-200 μg·kg-1 ranged from 65.1% to 116.4% with RSDs <24.1%. The limits of quantification (LOQs) were 2 μg·kg-1 or 5 μg·kg-1. The linear correlation coefficients were >0.99. There was no significant...
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Performance Level 2: High throughput applications; choose these when robustness and reproducibility are key Performance Level 3: High performance; choose these when sensitivity is a must No HPLC/UHPLC or GC instrument has been left behind. Our vials and well plates are suitable for all vendors' ...
"-" indicates no significant difference. 有机硫化物,这 5 类化合物也是造成不同产地金银 花气味产生差异的重要因素. 由图 4-C 可知,河南金银花 W5S,W1S 和 W1W 传感器的响应最高,说明河南金银花中含有较多的 氮氧化合物,短链烷烃和无机硫化物;山东金银花 与河南的金银花 W2W 传感器的响应强度相似,说 明...
Performance Level 2: High throughput applications; choose these when robustness and reproducibility are key Performance Level 3: High performance; choose these when sensitivity is a must No HPLC/UHPLC or GC instrument has been left behind. Our vials and well ...
Performance Level 2: High throughput applications; choose these when robustness and reproducibility are key Performance Level 3: High performance; choose these when sensitivity is a must No HPLC/UHPLC or GC instrument has been left behind. Our vials and well plates are suitable for all vend...