Nephelometric determination of total protein in cerebrospinal fluid and urine using benzalkonium chloride as precipitation reagent

M. D.S. Shephard, M. J. Whiting

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    Four different protein precipitants, namely trichloroacetic acid, sulphosalicylic acid, benzethonium chloride and benzalkonium chloride, were used to estimate the total protein concentration in cerebrospinal fluid and urine by nephelometry. Protein determinations for 50 cerebrospinal fluid samples and 100 urine samples were compared with values obtained by a trichloroacetic acid-Ponceau S spectrophotometric method. All methods were correlated well, but total protein results using acid precipitants were usually lower, while results obtained using benzethonium chloride were generally higher, than results obtained by the trichloroacetic acid-Ponceau S method. Anomalous results were obtained for some urine samples with benzethonium chloride, but not with benzalkonium chloride. Assays using benzalkonium chloride as precipitating reagent showed good precision and closest agreement with the trichloroacetic acid-Ponceau S dye-binding method. The use of benzalkonium chloride as precipitant is recommended for automated cerebrospinal fluid and urine protein estimations by nephelometry.

    Original languageEnglish
    Pages (from-to)411-417
    Number of pages7
    JournalAnnals of Clinical Biochemistry
    Volume29
    Issue number4
    DOIs
    Publication statusPublished - 1 Jul 1992

    Keywords

    • Benzalkonium chloride
    • Benzethonium chloride
    • Nephelometry
    • Protein estimation in cerebrospinal fluid and urine

    Fingerprint Dive into the research topics of 'Nephelometric determination of total protein in cerebrospinal fluid and urine using benzalkonium chloride as precipitation reagent'. Together they form a unique fingerprint.

  • Cite this