Shimadzu's new TOC-VW can be operated as a UV/Persulfate TOC, a Heated/Persulfate TOC, or as a unique Heated-UV-Persulfate TOC system. The three oxidation methods ensure rapid breakdown of difficult to oxidize compounds. According to the company, the analyzer can handle particulates up to 1.6 mm in diameter, the largest for any commercial analyzer, and it has the lowest detection limit (0.5 ppb) for any laboratory TOC on the market. The newly designed NDIR detector has five orders of magnitude linearity. Over-range samples can be compared with up to three calibration curves automatically.