obtaining unique identifier for a sample from fastq files

Question

[Sara]

in my fastq file which is named "8230-001-001_CTGATCGT-GCGCATAT_L004_R1.fastq.gz"

I am looking for the "unique identifier for a sample". here is the 1st few lines of the file:

@A00379:446:HGTTYDSX2:4:1101:1217:1094_GTGCCAAAGCAC 1:N:0:CTGATCGT+GCGCATAT
ATGTGGGCAAGGAGGCCCAGAGCAAGAGAGGCATCCTGACCCTGAAGTACCCCATGGAACACGGCATCATCACCAACTGGGATGACATGGAGAAGATCTGGCACCACACCTTCTACAACGAGCTGCGTGTGGCCCCTGAGGAGC
+
FF:FFFFF:FFFFFFFFFFFFFFFFFFFFFFFFFFF:FFFFFFFFFFFFFFFFFFFFF,FFFFFFFFFFFFFFFFFFFFFFFFFFFF:FFFFF,FFFFFFFFFFFFFFFFFFFFFFFFF,FFFFFFFFFFFFFFFFFFFFFFF:
@A00379:446:HGTTYDSX2:4:1101:11487:1094_ACGTTCAGCGTG 1:N:0:CTGATCGT+GCGCATAT
GGCGCTTGGCCTGTTCCATCTCCTCGTCCTTCTCTGCCAGCTTCCGCTCGATCTATGCCTTGATCTGGTTGAACTCTAGCTGGGCCCGGAGGATCTTGCCCTCCTCGTGCTCCAGGGAGGCCTGGGAAGGGGTGGGGTGAGGGC
+
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF,FFFFFFFF:FFF,,FFFFFFFFFFFFFFFF

do you know how I can find "unique identifier for a sample"?

[cpad0112]

index (CTGATCGT+GCGCATAT) is unique to sample . Contact sequencing core for sample-index details.

[swbarnes2]

Do you mean "unique to that sequencing run"? Or do you mean "universally unique"?

[Sara]

@swbarnes2 I mean unique identifier for each sample. example data is from one sample.

[swbarnes2]

I still don't understand what you want. The barcode index will be unique for that sample in that lane, but obviously other samples run in other lanes/flowcells/instruments could have the same barcode. Or, this sample could be run in multiple lanes, or multiple instruments.