Samples taken from trucks crossing at the Man Kam To Food Control Office undergo two tests : an on-the-spot test at the border that takes about 20 to 30 minutes and a laboratory test that takes two to three days to complete.
42.
The foundations of Feigl's work on spot analysis were the works of Hugo Schiff ( the earliest publication about " spot test " was Shiff's detection of uric acid in 1859 ) and of Christian Friedrich Schonberg and Friedrich Goppelsr�der on capillary analysis.
43.
Fritz Feigl is the creator of " spot analysis " ( spot test ), a simple and efficient technique where analytic assays are executed in only one, or a few drops, of a chemical solution, preferably in a great piece of filter paper, without using any sophisticated instrumentation.
