Hit Criteria

If there are too many hits in a spectra comparison (see Displaying and Using UV Spectra  Searching Single Reference Spectra) due to the selected comparison function (see Check Derivative) or Match Criterion, this list can be limited by adding the following selection criteria:

Only spectra fulfilling the corresponding criterion will be admitted into the selection.

All fields accepting alphanumeric input (*), can be searched with a regular expression, which may contain the common wildcards '?' and '*'.

Example:  If *y?ene is entered as the name filter, the hydrocarbons pyrene, chrysene and perylene would be hits, but not anthracene. The hit criteria can be used to comfortably generate sub-libraries. If using these filters, without comparing spectra, the hit list contains the spectra fulfilling the hit criteria. The partial quantity can be stored as a separate library.

 Tip:

Please note that a distinction is made between upper and lower case letters in the case of alphanumeric input. When using a capital letter in the filter expression, hits must also contain a capital letter at exactly the same position. When using lower case letters, the corresponding hit may contain lowercase and uppercase letters.