scholarly journals A study of the application of graphite MALDI to the analysis of short-chain polyethylene glycols

2021 ◽  
Author(s):  
Ulric Conway ◽  
Alexander D. Warren ◽  
Christopher J. Arthur ◽  
Paul J. Gates
Keyword(s):  
Molecular Weight ◽  
Lithium Chloride ◽  
Maldi Ms ◽  
Short Chain ◽  
Polyethylene Glycols ◽  
Low Molecular Weight ◽  
Colloidal Graphite ◽  
Graphite Matrix ◽  
Successful Analysis

MALDI-MS using colloidal graphite matrix doped with lithium chloride for the successful analysis of low molecular weight polymers.

Lateral habits of single crystals of metallocene-catalyzed low molecular weight short chain branched polyethylene from the melt

Polymer ◽  
2000 ◽  
Vol 41 (24) ◽  
pp. 8573-8577 ◽  
Author(s):  
Jieping Liu ◽  
Fengchao Xie ◽  
Binyang Du ◽  
Fajun Zhang ◽  
Qiang Fu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Single Crystals ◽  
Short Chain ◽  
Low Molecular Weight ◽  
Branched Polyethylene

Urine labeling with orally applied marker substances in drug substitution therapy

2004 ◽  
Vol 42 (6) ◽  
Author(s):  
Bernd Huppertz ◽  
Gisela Gauchel ◽  
Heribert Feiertag ◽  
Hermann Schweizer ◽  
Horst Krieger ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Oral Administration ◽  
Normal Values ◽  
Urine Samples ◽  
Outpatient Clinics ◽  
Polyethylene Glycols ◽  
Low Molecular Weight ◽  
Drug Addicts ◽  
Substitution Therapy ◽  
Marker Substances

AbstractThe compliance of 581 drug addicts attending six methadone substitution outpatient clinics was determined over a period of 18 months. Urine from these patients was labeled following oral administration of low molecular weight polyethylene glycols as marker substances. These substances were measured in approx. 5800 urine samples. A protocol for applying marker substances and ways to prevent substitution of urine samples were evaluated. Normal values for marker substances in urine were determined. The results suggest that this labeling procedure is a new diagnostictool to prevent manipulation of urine samples by drug addicts receiving substitution therapy.

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