Page 2 of 838 Advanced VA Sample Processor by Metrohm AG

the 838 advanced va sample processor in a nutshell the new 838 advanced va sample processor allows the fully automatic and extremely flexible processing of large sample series in the routine monitoring of electroplating baths this means that the 838 advanced va sample processor is the ideal partner for the 797 va computrace for the fully automated determination of organic additives in electroplating baths by means of the cvs technique cyclic voltammetric stripping both dilution titration dt for the determination of suppressors levelers carriers and lat linear approximation technique or mlat modified linear approximation technique for the determination of brighteners can be automated the large sample rack of the 838 advanced va sample processor with 112 positions for different vessel sizes guarantees the rapid and efficient determination of additives ­ even with large sample numbers the cvs technique is used for example for monitoring the following types of electroplating baths · acidic copper baths · tin baths · tin-lead baths · alkaline zinc baths existing manually operated 797 va computrace systems can of course be easily extended with the 838 advanced va sample processor suppressor determination suppressors and similar compounds are determined by dilution titration in combination with the cvs technique using an 800 dosino the calibration standard solutions or bath samples are taken from the sample vessels on the rack of the advanced va sample processor and added in small steps to the virgin makeup solution vms in the measuring vessel the vms is added by a second 800 dosino placing both samples and calibration standards on the sample processor makes it possible to automatically calibrate methods before and even during a sample series a maximum of 56 samples or calibration standard solutions can be analyzed in a single run between the determinations the measuring vessel is automatically emptied and thoroughly rinsed with water using two 823 membrane pump units carryover is thus reliably prevented completely automated analysis system for the determination of suppressors consisting of 797 va computrace 838 advanced va sample processor two 800 dosinos and rinsing equipment 838 advanced va sample processor

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