Standard nickel

The following blank-corrected readings were obtained for the determination of nickel in steel, using nickel standards dissolved in iron solution (10 g k ). The determination was performed by atomic absorption spectrometry using an air-acetylene flame and the 232 nm nickel line. 

Standard Preparations Prepare three Standard Preparations in the same manner as in the Test Preparation, but add 0.5 mL, 1.0 mL, and 1.5 mL, respectively, of 10 mg/kg nickel standard solution TS in addition to 20.0 g of sample. 

Nickel Standard Solution TS (10 mg/kg) Prepare a 0.40% (w/v) solution of analytical reagent-grade nickel chloride (NiCl2-6H20) with water. Pipet 1.0 mL of the solution into a 100-mL volumetric flask, and dilute to volume with water. 

Solutions and Indicators, 110 Acetic Acid TS, Strong, 110 Nickel Standard Solution, 110 Quimociac TS, 110 Sodium Hydroxide, 1 TV, 110 Sorbic Acid, 59 Soy Protein Concentrate, 59 Sucrose Acetate Isobutyrate, 60, 101 Sulfurol, 84 Sunset Yellow FCF, 29... 

Nickel cyclohexanebutyrate NBS No. 1065b, 13.89% Ni, for preparation of organo-nickel standard solution. 

Aspirate solutions into a fuel-lean air—acetylene flame and measure nickel absorbance at 232.00nm. Aspirate organic solvent solutions into the same flame previously optimized on nickel standards in an identical matrix. Flush the burner with 3-heptanone after aspiration of each standard and sample solution. For vegetable oils in MIBK, follow the tentative AOCS procedure [23d] as described in Section IV.B.6(iii). Prepare organo-nickel stock solution from 0.0360 g of Ni cyclohexane butyrate (NBS No. 1065b, 13.89% Ni, desiccated for 48 h over P205) according to the procedure in the same section. Aspirate sample and standard solutions into an optimized aii -acetylene flame. 

Differential Scanning Calorimetry. DSC scans were made at 20°C min"1 on a Mettler TA300O system equipped with a DSC-30 low temperature module. Temperature calibration was done with a multiple Indium-lead-nickel standard. An indium standard was used for heat flow calibration. Thin shavings (ca. 0.5 mm thick) were cut with a razor blade from the cross-sectional edge of a plaque. These sections contained both surface and center portions. 

The relative intensities were converted to the absolute values by measuring the intensity of the incident beam or by comparing the results with those obtained for a nickel standard. The difference between these results amounted to about 1%, i.e., it was within the limits of the experimental error. 

Atomic absorption spectrometer with background correction Graphite furnace with autosampler and pyrolytically coated graphite tubes Monoelement nickel hollow cathode lamp Nickel standard, 0.1 g Ni/liter (NiCh in water)... 

For biological monitoring of persons occupationally exposed to nickel, where higher concentrations might be expected, an extraction ratio of 4 1 is proposed. For calibration the aqueous nickel standards should be treated as the urine samples. The operational A AS parameters and the reliability criteria for the nickel determination in urine are presented in Table 2. 

NIST certificate, Nickel standard reference material- 762 for magnetic moment. 

Neutton diffiaction was performed on the D4c diffractometer [10] at the ILL at a wavelength of 0.4972 A. Glass samples of the same composition, for example all BTO samples, were loaded into a 5 nun inner diameter vanadium can. The total mass of samples at each composition is shown in Table 4.1. The average glass sample radius was L7 mm for the pure BTO and L4 mm for the doped samples. An anpty vanadium can, boron powder in a vanadium can, the empty belljar, and a nickel standard were also measured for calibralion and correction purposes. All meas-uronaits were made at room temperature. A sample packing fraction of 0.51 0.05 was determined from liquid volume measurements. All samples were corrected for... 

Table 8.2 Compliance with lead, copper and nickel standards in England and Wales in 2007 and 2008...

Compliance with the lead standard of 10 pg/1 is already >99% in some parts of England and Wales. It is worth noting that copper has not been considered a problem in the UK for many years, except for a few localised cases involving either intermittently low pH of the water in supply or poor installation involving debris. The high level of compliance with the EU nickel standard contrasts with lower levels of compliance elsewhere in Europe where ortho-phosphate is not dosed. 

Figure 8.44 Pyrolysis curves for a 2.6 ng nickel standard solution (Ni salt of 2-ethylhexanoic acid) in base mineral oil, and a crude oil sample, diluted with IBMK and as oil-in-water emulsions, respectively, using LS GF AAS...

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