MATTEL7420对应的GC-MS IDL与MDL,有附件,请参考 2.6.6.5 Note: Instrument Detection Limit (IDL) – 3 times the standard deviation of 1 replicate measurements of reagent blank. Method Detection Limit (MDL) – Reagent blank fortified with 2-3 times of th IDL. Seven replicate measurements are made. Calculate the MDL as follow MDL = (t) x (S), where t=3.14(99% confidence level for 7 replicates) and s standard deviation. Since the MDL is statistically based, the MDL value obtained must verified to ensure the instrument can accurately detect at this level. Prepare a standard at a concentration equivalent to the MDL of eac phthalate. Analyze this standard with the number of replicates set to 10. The average result shall be within ±10% of the MDL value. If the average result is not within ±10% of the MDL value, prepare a new standard at a higher concentration and repeat steps until an acceptable value is obtained. This value is the MDL that shall be used tive Identification