Gas Chromatography Which of the following detectors give concentration-dependent signals? Electron-capture detector Thermal conductivity All of these Infra-red detector Electron-capture detector Thermal conductivity All of these Infra-red detector ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Sample injection is considered successful if the sample is concentrated at the start of the column the sample is spread evenly along the column the sample is homogenously spread along the column all of the sample in the injector has been added to the column the sample is concentrated at the start of the column the sample is spread evenly along the column the sample is homogenously spread along the column all of the sample in the injector has been added to the column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Derivatisation of a sample is carried out to All of these increase volatility of the analytes reduce polarity of the analytes increase the detector response All of these increase volatility of the analytes reduce polarity of the analytes increase the detector response ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography Resolution is proportional to the square of the number of theoretical plates in a column square root of the number of theoretical plates in a column cube root of the number of theoretical plates in a column number of theoretical plates in a column square of the number of theoretical plates in a column square root of the number of theoretical plates in a column cube root of the number of theoretical plates in a column number of theoretical plates in a column ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography What does the retention factor, k', describe? The migration rate of an analyte through a column The distribution of an analyte between the stationary and the mobile phase All of these The velocity of the mobile phase The migration rate of an analyte through a column The distribution of an analyte between the stationary and the mobile phase All of these The velocity of the mobile phase ANSWER DOWNLOAD EXAMIANS APP
Gas Chromatography A retention gap is placed between the injector and the front of the column to All of these prevent backflush of the injected solution retain the sample and release it gradually to the column retain contaminants and prevent them from reaching the column All of these prevent backflush of the injected solution retain the sample and release it gradually to the column retain contaminants and prevent them from reaching the column ANSWER DOWNLOAD EXAMIANS APP
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