Ashing method adhesives

Method. Into clean platinum vessels accurately weigh approximately 2.0 g of each cyanoacryate adhesive listed in column 1 of Table 6.1. Into one series add 0.1 g of PTSA and in the second series no PTSA is added. Ash both samples using the conditions in Table 6.2. Figure 6.2 shows the ramping and hold stages for ashing cyanoacrylate adhesives. 

Ashing Method of Type A and Type B Anaerobic Adhesives... 

Table 6.5 Results of analysis of metal for metal content of Type A and Type B adhesives after sample preparation using dry ashing method...

Results. The results of analysis of epoxy adhesives using the ashing method are shown in Table 6.16. 

Ashing Methods for Metal Analysis of Polyurethane Adhesives... 

Method. An accurate weight of approximately 2.0 to 3.0 g of each polyurethane listed in Table 6.24 is placed in a clean platinum dish with 0.15 g of PTSA. The samples are ashed using a program of ramping/holding stages similar to methods described for cyanoacrylate adhesives to a maximum temperature of 650 °C. The resulting ashes are contacted with 10.0 ml of 0.1 M HC1 and the suspensions transferred to a Teflon beaker. To each add 2.0 ml of cone. HF and heat to -150 °C on a hot plate to dissolve the SiC>2. The clear solutions are made up to mark in a plastic volumetric flask with deionised water. 

Table 6.27 Results of analysis of polyurethane (PU) adhesives spiked with 0.1 % organometallic catalysts using destructive methods ashing, microwave acid digestion and bomb combustion methods of sample preparation...

Absolute entropy, 51 Absorption edge, 351 Activated carbon, 710-713 adsorption of metal cations on, 712, 713 de-ashed, 713 heteroelenients in, 711 lEP and PZC of, 711, 712 reductive adsorption on, 711 Activation, 710 energy, 532 Activity, 50 coefficient, 588, 589 of surface species, 591 Adhesion method, 84 Adsolubilization, 494 Adsorbates, index of, 356-358, 428 32, 476, 477 Adsorption capacity, 581 competition, 510-530 dynamic studies, 335 edge, 328 envelope, 328 isotherm, 327... 

Federal Test Method Std. 175B, Method 4032.1 Ash content of adhesives. 

D 2077 ASH IN FATTY QUAT AMMONIUM CHLORIDES D 2074 INDICATOR METHOD, FATTY AMINES D 2075 IODINE VALUE OF FATTY AMINES D 2076 ACID/AMINE FATTY QUAT AMMONIUM CHLORIDE D 2078 IODINE OF FATTY QUAT AMMONIUM D 2079 NONVOLATILES/FATTY AMMONIUM CHLORIDES D 2081 PH OF FATTY QUATERNARY AMMONIUM CHLORIDES D 2086 ACIDITY IN VINYL ACETATE AND ACETALDEHYDE D 2090 CLARITY/CLEANNESS OF PAINT AND INK LIQUIDS D 2091 PRINT RESISTANCE OF LACQUERS D 2197 SCRAPE ADHESION OF ORGANIC COATINGS... 

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