Turbidimetric flow-injection determination of total nitrogen and potassium in vegetables
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چکیده
منابع مشابه
Determination of sulfate in natural and residual waters by turbidimetric flow-injection analysis.
A turbidimetric flow-injection system was developed for the determination of sulfate in natural and residual water samples, with no previous treatment, using spectrophotometric detection. The precipitating agent, 7.0% (w/v) barium chloride solution prepared in 0.10% (w/v) polyvinyl alcohol, was added by using the merging-zones approach. A 100 mg/L sulfate solution in 0.07M nitric acid was mixed...
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This study presents a flow injection system for the sequential determination of free (CN(-)) and total (CN(-)+ HCN) cyanide using a potentiometric method which employs two different processes for the determination of these two chemical species. The first process is based on direct detection of CN(-) using an ion-selective electrode for cyanide. In the second process, the sample is mixed with ac...
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متن کاملTotal nitrogen determination
As a preliminary to the consideration of automated, or more correctly mechanized, methods for the determination of total organic nitrogen the discussion of some general aspects of nitrogen determination is illuminating. There are at least four recent reviews, for example those by Bradstreet (1965), Fleck & Munro (I965), Jacobs (1965), and Munro & Fleck (1969), of the determination of nitrogen f...
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ژورنال
عنوان ژورنال: Analytica Chimica Acta
سال: 1997
ISSN: 0003-2670
DOI: 10.1016/s0003-2670(97)00555-2