scholarly journals Preliminary observations on the total phosphorus content of the inshore waters of the Malabar Coast off Calicut

1957 ◽  
Vol 45 (2) ◽  
pp. 77-85 ◽  
Author(s):  
S. V. Suryanarayana Rao
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Content ◽  
Total Phosphorus Content ◽  
Malabar Coast ◽  
Inshore Waters

scholarly journals Total phosphorus content of Neomysis integer

1967 ◽  
Vol 16 (1) ◽  
pp. 99-100 ◽  
Author(s):  
J. Tundisi ◽  
S. Krishnaswamy
Keyword(s):  
Body Weight ◽  
Total Phosphorus ◽  
Inverse Relationship ◽  
Phosphorus Content ◽  
Neomysis Integer ◽  
Total Phosphorus Content

Measurements of total phosphorus in Neomysis integer, showed an inverse relationship between the total phosphorus content and body weight (wet). Immature forms, presented higher content of phosphorus. Some possible implications of these results are discussed.

Poorly soluble, iron-aluminium phosphates in ammonium phosphate fertilizers: Their nature and availability to plants

Soil Research ◽  
1983 ◽  
Vol 21 (2) ◽  
pp. 183 ◽  
Author(s):  
RJ Gilkes ◽  
P Mangano
Keyword(s):  
Total Phosphorus ◽  
Powder Diffraction ◽  
Phosphorus Content ◽  
Ammonium Phosphate ◽  
Residual Value ◽  
Phosphate Fertilizers ◽  
Total Phosphorus Content ◽  
X Ray ◽  
Poorly Soluble ◽  
Residual Effectiveness

Both monoammonium and diammonium phosphate fertilizers contain various (Ca,Mg)(NH4)- (Fe,Al)(PO4)(F,OH)H2O compounds that are insoluble in water and comprise 4.9-9.9% of the total phosphorus content of the fertilizers. The compounds have been isolated and characterized by chemical, X-ray powder diffraction, ix., and thermogravimetric techniques. The compounds are only 35-60% as effective as monocalcium phosphate (MCP) in supplying phosphorus to wheat grown under glasshouse conditions. The residual effectiveness of the compounds for a second crop of wheat was generally lower (10-20% relative to freshly applied MCP) than the residual value of MCP (20 %).

Spectrophotometric Determination of Phosphorus in Certifiable Straight Color Additives: Collaborative Study

1981 ◽  
Vol 64 (4) ◽  
pp. 808-813
Author(s):  
Wallace S Brammell ◽  
◽  
C Arozarena ◽  
J Hunter ◽  
H G Kiernan ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Content ◽  
Collaborative Study ◽  
Mean Values ◽  
Total Phosphorus Content ◽  
Standard Curve ◽  
Coefficients Of Variation ◽  
Molybdovanadophosphoric Acid ◽  
Acid Reagent

Abstract A simple and rapid spectrophotometric method was developed for determining the total phosphorus content of certifiable straight color additives. The dye sample is mixed with a cellulose powder and MgO mixture, and ashed at 500°C in a small Pyrex beaker in a muffle furnace. The ash is dissolved in vanadomolybdic acid reagent and filtered through glass wool, and the absorbance of the resulting yellow molybdovanadophosphoric acid solution is measured at 400 nm. The total phosphorus content of the sample, expressed as percent Na3PO4, is determined from a standard curve. Recovery of phosphorus added as KH2PO4 to 39 different dyes in amounts equivalent to 0.300% Na3PO4 ranged from 95.3 to 106.8%, averaging 100.6%. In the collaborative study, 7 laboratories successfully performed duplicate analyses of 6 different dyes (D&C Orange No. 5, D&C Yellow No. 8, FD&C Blue No. 2, FD&C Red No. 3, FD&C Red No. 40, and FD&C Green No. 3). The mean values found ranged from 0.325 to 6.86% Na3PO4. In general, the accuracy and reproducibility of the method were satisfactory, with single determination coefficients of variation ranging from 3.76 to 9.60%. The method was adopted official first action.

scholarly journals Agro-Environmental Benefit and Risk of Manure- and Bone Meal-Derived Pyrogenic Carbonaceous Materials as Soil Amendments: Availability of PAHs, PTEs, and P

Agronomy ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 802 ◽  
Author(s):  
Vladimír Frišták ◽  
Martin Pipíška ◽  
Gerhard Soja ◽  
Alena Klokočíková Packová ◽  
Michal Hubeňák ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Environmental Protection Agency ◽  
Phosphorus Content ◽  
Chicken Manure ◽  
Total Carbon ◽  
Carbonaceous Materials ◽  
Bone Meal ◽  
Total Phosphorus Content ◽  
Us Epa

The worldwide boom of biochar and pyrogenic carbonaceous material application as a potential soil additive has brought about not only agricultural benefits such as enhanced crop yield, nutrients supply (P), and soil organic carbon increase, but also, on the other hand, environmental risk of organic (polycyclic aromatic hydrocarbons (PAHs)) and potentially toxic element (PTE) penetration into arable soils. Therefore, our study assessed pyrogenic carbonaceous materials (PCM) produced from the P-rich feedstocks—chicken manure (CM) and bone meal (BM)—as promising and safe alternatives for inorganic P fertilizers. Pyrogenic materials produced in the process of slow pyrolysis at residence time 2 h, 400 and 500 °C, were characterized by determination of pH, electrical conductivity (EC), elemental analysis of total C, H, N, S scanning electron microscopy (SEM), total content of P, selected potentially toxic elements (PTEs), and available forms of PTEs and P by diethylenetriaminepentaacetic acid (DTPA) and calcium-acetate-lactate (CAL) extractions. CMPCM4, CMPCM5, BMPCM4, and BMPCM5 were characterized by determination of total 16 US-EPA (U.S. Environmental Protection Agency) PAHs by toluene extraction protocol and available concentrations by Tenax resin approach. Additionally, CMPCM4, CMPCM4, BMPCM4, and BMPCM5 were tested in earthworm avoidance test with Eisenia foetita and short-term rye-seedling germination test. Obtained results showed decreasing of total carbon in the order of BM > BMPCM4 > BMPCM5 and increasing in the order of CM < CMPCM4 < CMPCM5. Total phosphorus content increased from 56.8 ± 1.7 g kg−1 (BM) to 85.2 ± 4.2 g kg−1 (BMPCM4) to 110.5 ± 7.0 g kg−1 (BMPCM5). In the case of chicken manure-derived pyrogenic materials, total phosphorus content increased in the order of CM (22.9 ± 2.0 g kg−1) < CMPCM4 (37.0 ± 4.5 g kg−1) < CMPCM5 (40.0 ± 3.4 g kg−1). Availability of selected PTEs and P decreased in pyrogenic materials compared to feedstock. Total concentration of ∑16-US-EPA PAHs in BMPCM4 and BMPCM5 was 3.92 mg kg−1; CMPCM4, 7.33 mg kg−1; and CMPCM, 6.69 mg kg−1. The Tenax-available ∑16-PAHs showed concentrations of 0.53 mg kg−1 for BMPCM4, 0.26 mg kg−1 for BMPCM5, 1.13 mg kg−1 for CMPCM4, and 0.35 mg kg−1 for CMPCM5. Total P concentrations determined in rye aboveground tissues showed the highest accumulation ability in the case of CMPCM5 compared to other samples. Pyrogenic carbonaceous materials produced from chicken manure and bone meal at 400 and 500 °C have the potential to be P slow release fertilizers and may be ecologically safe.

Determination of total phosphorus content in bottom sediment samples using inductively coupled plasma optical emission spectrometry

2017 ◽  
Vol 32 (1) ◽  
pp. 66-72
Author(s):  
Katarzyna Szczepańska ◽  
Grażyna Dembska ◽  
Łukasz Zegarowski ◽  
Grażyna Pazikowska-Sapota ◽  
Katarzyna Galer-Tatarowicz ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Total Phosphorus ◽  
Inductively Coupled Plasma ◽  
Phosphorus Content ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Sediment Samples ◽  
Total Phosphorus Content ◽  
Inductively Coupled ◽  
Plasma Optical Emission Spectrometry

This paper describes the methodology of inductively coupled plasma optical emission spectrometry for determining the total phosphorus content in bottom sediment samples. Homogenized samples subjected to a microwave-assisted aqua regia digestion, and next analyzed for total phosphorus content using the inductively coupled plasma optical emission spectrometer. The method was optimized and its validation parameters were determined. Assessing the selectivity of the method, found the spectral interferences of other elements (especially copper) on P can be partially eliminated by using the optimal operating conditions. The method exhibited excellent linearity (r>0.999) in the entire measurement range (25-5000 mg Pkg-1) and very good recovery (99%). It was also characterized by high repeatability (relative standard deviation of 1%) and reproducibility (reproducibility standard deviation of 10%). The relative expanded uncertainty of the method was estimated at 21.2%.

scholarly journals Total Phosphorus Content in Various Types of Cooked Sausages from the Serbian Market

2015 ◽  
Vol 5 ◽  
pp. 152-155
Author(s):  
Vladimir Koricanac ◽  
Danijela Vranic ◽  
Slobodan Lilic ◽  
Dragan Milicevic ◽  
Sladjana Sobajic ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Content ◽  
Total Phosphorus Content
Sign in / Sign up

Export Citation Format

Share Document